THIS
      SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED
      (THE “SECURITIES ACT”), OR THE SECURITIES LAWS OF ANY STATE, AND IS BEING
      OFFERED AND SOLD PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS
      OF
      THE SECURITIES ACT AND SUCH LAWS. THIS SECURITY MAY NOT BE SOLD OR TRANSFERRED
      EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
      ACT
      OR PURSUANT TO AN AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF
      THE
      SECURITIES ACT OR SUCH OTHER LAWS.

     

    6
      1⁄4 % CONVERTIBLE DEBENTURE

     

    Company:
      3DIcon
      Corporation

    Company
      Address: 7507
      Sandusky Ave., Tulsa, Oklahoma 74136

    Closing
      Date: November
      20, 2007

    Maturity
      Date: November
      20, 2010

    Principal
      Amount:
      $1,250,000

    First
      Payment Due Date: January
      15, 2008

     

    3DIcon
      Corporation, an Oklahoma corporation, and any successor or resulting corporation
      by way of merger, consolidation, sale or exchange of all or substantially all
      of
      the assets or otherwise (the “Company”),
      for
      value received, hereby promises to pay to the Holder (as such term is
      hereinafter defined), or such other Person (as such term is hereinafter defined)
      upon order of the Holder, on the Maturity Date, the Principal Amount (as such
      term is hereinafter defined), as such sum may be adjusted pursuant to Article
      3,
      and to pay interest thereon from the Closing Date, monthly in arrears, on the
      15th
      day of
      each month (each an “Interest
      Payment Due Date”
      and
      collectively, the “Interest
      Payment Due Dates”),
      commencing on the First Payment Due Date, at the rate of six and one-quarter
      percent (6 1⁄4 %) per annum (the “Debenture
      Interest Rate”),
      until
      the Principal Amount of this Debenture has been paid in full. All interest
      payable on the Principal Amount of this Debenture shall be calculated on the
      basis of a 360-day year for the actual number of days elapsed. Payment of
      interest on this Debenture shall be in cash or, at the option of the Holder,
      in
      shares of Common Stock of the Company valued at the then applicable Conversion
      Price (as defined herein). This Debenture may not be prepaid without the written
      consent of the Holder. This Debenture shall constitute the “Second Debenture,”
as defined in the Securities Purchase Agreement

     

    ARTICLE
      1

    DEFINITIONS

     

    SECTION
      1.1 Definitions.
      The
      terms defined in this Article whenever used in this Debenture have the following
      respective meanings:

     

    (i) “Affiliate”
      has the
      meaning ascribed to such term in Rule 12b-2 under the Securities Exchange Act
      of
      1934, as amended.

     

    (ii) “Bankruptcy
      Code”
      means
      the United States Bankruptcy Code of 1986, as amended (11 U.S.C. §§ 101
et.
      seq.).

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        1

        
          

        

      

      
        
        

      

    

     

    (iii) “Business
      Day”
      means a
      day other than Saturday, Sunday or any day on which banks located in the State
      of California are authorized or obligated to close.

     

    (iv) “Capital
      Shares”
      means
      the Common Stock and any other shares of any other class or series of capital
      stock, whether now or hereafter authorized and however designated, which have
      the right to participate in the distribution of earnings and assets (upon
      dissolution, liquidation or winding-up) of the Company.

     

    (v) “Common
      Shares”
      or
“Common
      Stock”
      means
      shares of the Company’s Common Stock.

     

    (vi) “Common
      Stock Issued at Conversion”,
      means
      the Common Stock deliverable upon conversion of this Debenture, including all
      securities of any other class or series into which this Debenture may hereafter
      be convertible, whether now or hereafter created and however
      designated.

     

    (vii) “Conversion”
      or“conversion”
      means
      the repayment by the Company of the Principal Amount of this Debenture (and,
      to
      the extent the Holder elects as permitted by Section 3.1, accrued and unpaid
      interest thereon) by the delivery of Common Stock on the terms provided in
      Section 3.2, and “convert,” “converted,” “convertible”
      and like
      words shall have a corresponding meaning.

     

    (viii) “Conversion
      Date”
      means
      any day on which all or any portion of the Principal Amount of this Debenture
      is
      converted in accordance with the provisions hereof.

     

    (ix) “Conversion
      Notice”
      means a
      written notice of conversion substantially in the form annexed hereto as
Exhibit
      A.
      

     

    (x) “Conversion
      Price”
      on any
      date of determination means the applicable price for the conversion of this
      Debenture into Common Shares on such day as set forth in Section
      3.1(a).

     

    (xi) “Current
      Market Price”
      on any
      date of determination means the closing price of a Common Share on such day
      as
      reported on the “pink sheets” through the Interdealer Trading and Quotation
      System; provided that, if such security is not traded on the over the counter
      market via the pink sheets, then as reported on the NASDAQ OTCBB Exchange;
      provided
      that,
      if
      such security is not traded on the over the counter market via the pink sheets,
      then as reported on the NASDAQ OTCBB, or if not so traded on the OTCBB, then
      as
      reported on the principal national security exchange or quotation system on
      which such security is quoted or listed or admitted to trading, or, if not
      quoted or listed or admitted to trading on any national securities exchange
      or
      quotation system, the closing bid price of such security on the over-the-counter
      market on the day in question as reported by Bloomberg LP or a similar generally
      accepted reporting service, as the case may be.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        2

        
          

        

      

      
        
        

      

    

     

    (xii) “Deadline”
      means
      the date that is the 90th day from the Closing Date, provided, however, the
      Deadline shall be extended by such time as is necessary for the Company to
      respond to comments by the SEC, so long as the Company files the appropriate
      registration statement
      within 30 days of the Closing Date and thereafter responds to all SEC comments
      within 10 Business Days of receipt thereof, and provided, further, that such
      10
      Business Day period shall be extended to a date that is the second Business
      Day
      following the receipt by the Company of information necessary to formulate
      such
      response to the SEC in the event such information must be provided by the Holder
      or an Affiliate of the Holder, and such information is not provided to the
      Company on or before eight Business Days from the original receipt of the SEC
      comments.

     

    (xiii) “Debenture”
      or
      “Debentures”
      means
      this Convertible Debenture of the Company or such other convertible debenture(s)
      exchanged therefor as provided in Section 2.1.

     

    (xiv) “Discount
      Multiplier”
has
      the
      meaning set forth in Section 3.1(a).

     

    (xv) “Event
      of Default”
      has the
      meaning set forth in Section 6.1.

     

    (xvi) “Holder”
      means
      Golden Gate Investors, Inc., any successor thereto, or any Person to whom this
      Debenture is subsequently transferred in accordance with the provisions
      hereof.

     

    (xvii) “Interest
      Payment Due Date”
      has the
      meaning set forth in the opening paragraph of this Debenture.

     

    (xviii) “Market
      Disruption Event”
      means
      any event that results in a material suspension or limitation of trading of
      the
      Common Shares.

     

    (xix) “Market
      Price”
      per
      Common Share means the closing price of the Common Shares on any Trading Day
      as
      reported in the “pink sheets” through the Interdealer Trading Quotation System;
      provided, if such security is not traded on the over the counter market via
      the
      pink sheets, then the closing price on the NASDAQ OTCBB; provided
      further, that,
      if
      such security is not listed or admitted to trading on the NASDAQ OTCBB, as
      reported on the principal national security exchange or quotation system on
      which such security is quoted or listed or admitted to trading, or, if not
      quoted or listed or admitted to trading on any national securities exchange
      or
      quotation system, the lowest price of the Common Shares during any Trading
      Day
      on the over-the-counter market as reported by Bloomberg LP or a similar
      generally accepted reporting service, as the case may be.

     

    (xx) “Maximum
      Rate”
      has the
      meaning set forth in Section 6.4.

     

    (xxi) “Outstanding”
      when
      used with reference to Common Shares or Capital Shares (collectively,
“Shares”)
      means,
      on any date of determination, all issued and outstanding Shares, and includes
      all such Shares issuable in respect of outstanding scrip or any certificates
      representing fractional interests in such Shares; provided,
      however,
      that
      any such Shares directly or indirectly owned or held by or for the account
      of
      the Company or any Subsidiary of the Company shall not be deemed “Outstanding”
      for
      purposes hereof.

     

    
      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        3

        
          

        

      

      
        
        

      

    

     

    (xxii) “Person”
      means an
      individual, a corporation, a partnership, an association, a limited liability
      company, an unincorporated business organization, a trust or other entity or
      organization, and any government or political subdivision or any agency or
      instrumentality thereof.

     

    (xxiii) “Principal
      Amount”
      means,
      for any date of calculation, the principal sum set forth in the first paragraph
      of this Debenture; provided (1) “Principal Amount” shall include only so much of
      the amount which the Holder has actually advanced pursuant to the Securities
      Purchase Agreement and which has actually been advanced to the Company out
      of
      the Escrow, and (2) “Principal Amount” shall not include any amount of the
      Debenture with respect to which Holder has at the time furnished a Conversion
      Notice in compliance with Section 3.2. Notwithstanding anything herein or in
      the
      Securities Purchase Agreement to the contrary, Holder shall never be entitled
      to
      convert any portion of the Debenture with respect to which Holder has not yet
      paid the Purchase Price and such portion of the Purchase Price has been released
      to the Company from the Escrow, in accordance with the terms of the Securities
      Purchase Agreement.

     

    (xxiv) “Registration
      Rights Agreement”
      means
      that certain Registration Rights Agreement of even date herewith by and between
      the Company and Holder, as the same may be amended from time to
      time.

     

    (xxv) “SEC”
      means
      the United States Securities and Exchange Commission.

     

    (xxvi) “Securities
      Act”
      means
      the Securities Act of 1933, as amended, and the rules and regulations of the
      SEC
      thereunder, all as in effect at the time.

     

    (xxvii) “Securities
      Purchase Agreement”
      means
      that certain Securities Purchase Agreement dated November 3, 2006 by and among
      the Company and Holder, as the same may be amended from time to
      time.

     

    (xxviii) “Subsidiary”
      means
      any entity of which securities or other ownership interests having ordinary
      voting power to elect a majority of the board of directors or other persons
      performing similar functions are owned directly or indirectly by the
      Company.

     

    (xxix) “Trading
      Day”
      means
      any day on which (i) purchases and sales of securities on the principal national
      security exchange or quotation system on which the Common Shares are traded
      are
      reported thereon, or, if not quoted or listed or admitted to trading on any
      national securities exchange or quotation system, as reported by Bloomberg
      LP or
      a similar generally accepted reporting service, as the case may be, (ii) at
      least one bid for the trading of Common Shares is reported and (iii) no Market
      Disruption Event occurs.

     

    (xxx) “Volume
      Weighted Average Price” per
      Common Share means the volume weighted average price of the Common Shares during
      any Trading Day as reported on the NASDAQ OTCBB; provided
      that, if
      such security is not listed or admitted to trading on the NASDAQ OTCBB, as
      reported on the principal national security exchange or quotation system on
      which such security is quoted or listed or admitted to trading, or, if not
      quoted or listed or admitted to trading on any national securities exchange
      or
      quotation system, the volume weighted average price of the Common Shares during
      any Trading Day on the over-the-counter market
      as
      reported by Bloomberg LP or a similar generally accepted reporting service,
      as
      the case may be.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        4

        
          

        

      

      
        
        

      

    

     

    All
      references to “cash” or “$” herein means currency of the United States of
      America.

     

    ARTICLE
      2

    EXCHANGES,
      TRANSFER AND REPAYMENT

     

    SECTION
      2.1 Registration
      of Transfer of Debentures.
      This
      Debenture, when presented for registration of transfer, shall (if so required
      by
      the Company) be duly endorsed, or be accompanied by a written instrument of
      transfer in form reasonably satisfactory to the Company duly executed, by the
      Holder duly authorized in writing.

     

    SECTION
      2.2 Loss,
      Theft, Destruction of Debenture.
      Upon
      receipt of evidence satisfactory to the Company of the loss, theft, destruction
      or mutilation of this Debenture and, in the case of any such loss, theft or
      destruction, upon receipt of indemnity or security reasonably satisfactory
      to
      the Company, or, in the case of any such mutilation, upon surrender and
      cancellation of this Debenture, the Company shall make, issue and deliver,
      in
      lieu of such lost, stolen, destroyed or mutilated Debenture, a new Debenture
      of
      like tenor and unpaid Principal Amount dated as of the date hereof (which shall
      accrue interest from the most recent Interest Payment Due Date on which an
      interest payment was made in full). This Debenture shall be held and owned
      upon
      the express condition that the provisions of this Section 2.2 are exclusive
      with
      respect to the replacement of a mutilated, destroyed, lost or stolen Debenture
      and shall preclude any and all other rights and remedies notwithstanding any
      law
      or statute existing or hereafter enacted to the contrary with respect to the
      replacement of negotiable instruments or other securities without the surrender
      thereof.

     

    SECTION
      2.3 Who
      Deemed Absolute Owner.
      The
      Company may deem the Person in whose name this Debenture shall be registered
      upon the registry books of the Company to be, and may treat it as, the absolute
      owner of this Debenture (whether or not this Debenture shall be overdue) for
      the
      purpose of receiving payment of or on account of the Principal Amount of this
      Debenture, for the conversion of this Debenture and for all other purposes,
      and
      the Company shall not be affected by any notice to the contrary. All such
      payments and such conversions shall be valid and effectual to satisfy and
      discharge the liability upon this Debenture to the extent of the sum or sums
      so
      paid or the conversion or conversions so made.

     

    SECTION
      2.4 Repayment
      at Maturity.
      At the
      Maturity Date, the Company shall repay the outstanding Principal Amount of
      this
      Debenture in whole in cash, together with all accrued and unpaid interest
      thereon, in cash, to the Maturity Date. 

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        5

        
          

        

      

      
        
        

      

    

     

    ARTICLE
      3

    CONVERSION
      OF DEBENTURE

     

    SECTION
      3.1 Conversion;
      Conversion Price; Valuation Event.
      

     

    (a)
      Subject to the limitations set forth in Section 3.5 hereof, and further subject
      to the limitations on the obligation to either release funds from the Escrow
      or
      issue Conversion Shares pursuant to Section I.B of the Securities Purchase
      Agreement, at the option of the Holder, this Debenture may be converted, either
      in whole or in part, up to the full Principal Amount hereof into Common Shares
      (calculated as to each such conversion to the nearest 1/100th of a share),
      at
      any time and from time to time on any Business Day, subject to compliance with
      Section 3.2. The number of Common Shares into which this Debenture may be
      converted is equal to the dollar amount of the Debenture being converted divided
      by the Conversion Price. The “Conversion
      Price”
      shall be
      equal to the lesser of (i) $2.00, or (ii) 90% of the average of the five lowest
      Volume Weighted Average Prices during the twenty Trading Days prior to Holder’s
      election to convert (the percentage figure being a “Discount
      Multiplier”);
      provided,
      that in
      the event the Registration Statement has not been declared effective by the
      SEC
      by the Deadline then the applicable Discount Multiplier shall decrease by three
      percentage points for each month or partial month occurring after the Deadline
      that the Registration Statement is not effective or, if the Registration
      Statement has theretofore been declared effective but is not thereafter
      effective, then the applicable Discount Multiplier shall decrease by three
      percentage points for each week or partial week occurring after the Deadline
      that the Registration Statement is not effective. In addition, if the
      Registration Statement has theretofore been declared effective but is not
      thereafter effective, Holder, at its option, shall be entitled to the Conversion
      Price on the date that the Registration Statement is no longer effective, for
      a
      period beginning on the date that the Registration Statement is declared
      effective and continuing for the number of days that a Registration Statement
      was not effective. The Company reserves the right to increase the number of
      Trading Days in clause (ii) above, as it deems appropriate.

     

    If
      the
      Holder elects to convert a portion of the Debenture and, on the day that the
      election is made, the Volume Weighted Average Price is below $0.75, the Company
      shall have the right to prepay that portion of the Debenture that Holder elected
      to convert, plus any accrued and unpaid interest, at 135% of such amount. In
      the
      event that the Company elects to prepay that portion of the Debenture, Holder
      shall have the right to withdraw its Conversion Notice. If, at anytime during
      the month, the Volume Weighted Average Price is below $0.75, Holder shall not
      be
      obligated to convert any portion of the Debenture during that month.


     

    (b) Notwithstanding
      the provisions of Section 3.1(a), in the event the Company’s Registration
      Statement has not been declared effective by the Deadline or, if the
      Registration Statement has theretofore been declared effective but is not
      thereafter effective, the following will also apply in addition to any damages
      incurred by the Holder as a result thereof:

     

    (i) The
      Holder may demand repayment of one hundred and fifteen percent (115%) of the
      Principal Amount of the Debenture, together with all accrued and unpaid interest
      on the Principal Amount of the Debenture, in cash, at any time after the
      Deadline but prior to the Company’s Registration Statement being declared
      effective by the SEC or during the period that the Company’s Registration
      Statement is not effective, such repayment to be made within three (3) business
      days of such demand. In the event that the Debenture is so accelerated, in
      addition to the repayment of one hundred and fifteen percent (115%) of the
      Principal Amount together with accrued interest as aforesaid, the Company shall
      immediately issue and pay, as the case may be, to the Holder 25,000 Shares
      of
      Common Stock and $15,000 for each thirty (30) day period,
      or portion thereof, during which the Principal Amount, including interest
      thereon, remains unpaid following demand, with the monthly payment amount to
      increase to $20,000 for each thirty (30) day period, or portion thereof, after
      the first ninety (90) day period;

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        6

        
          

        

      

      
        
        

      

    

     

    (ii) If
      the
      SEC indicates that the Company’s Registration Statement will be declared
      effective upon request by the Company, and the Company does not, within 3
      business days of the SEC indication, request that the Registration Statement
      become effective, the amounts set forth in subsection (i) above shall
      double.

     

    SECTION
      3.2 Exercise
      of Conversion Privilege.
      

     

    (a) Conversion
      of this Debenture may be exercised on any Business Day by the Holder by
      telecopying an executed and completed Conversion Notice to the Company. Each
      date on which a Conversion Notice is telecopied to the Company in accordance
      with the provisions of this Section 3.2 shall constitute a Conversion Date.
      The
      Company shall convert this Debenture and issue the Common Stock Issued at
      Conversion in the manner provided below in this Section 3.2, and all voting
      and
      other rights associated with the beneficial ownership of the Common Stock Issued
      at Conversion shall vest with the Holder, effective as of the Conversion Date
      at
      the time specified in the Conversion Notice. The Conversion Notice also shall
      state the name or names (with addresses) of the persons who are to become the
      holders of the Common Stock Issued at Conversion in connection with such
      conversion. As promptly as practicable after the receipt of the Conversion
      Notice as aforesaid, but in any event not more than two (2) Business Days after
      the Company’s receipt of such Conversion Notice, the Company shall (i) issue the
      Common Stock Issued at Conversion in accordance with the provisions of this
      Article 3 and (ii) cause to be mailed for delivery by overnight courier, or
      if a
      Registration Statement covering the Common Stock has been declared effective
      by
      the SEC cause to be electronically transferred, to Holder (x) a certificate
      or
      certificate(s) representing the number of Common Shares to which the Holder
      is
      entitled by virtue of such conversion, (y) cash, as provided in Section 3.3,
      in
      respect of any fraction of a Common Share deliverable upon such conversion
      and
      (z) cash or shares of Common Stock, as applicable, representing the amount
      of
      accrued and unpaid interest on this Debenture as of the Conversion Date. Such
      conversion shall be deemed to have been effected as of the Conversion Date,
      and
      at such time the rights of the Holder of this Debenture, as such (except if
      and
      to the extent that any Principal Amount thereof remains unconverted), shall
      cease and the Person and Persons in whose name or names the Common Stock issued
      at Conversion shall be issuable shall be deemed to have become the holder or
      holders of record of the Common Shares represented thereby, and all voting
      and
      other rights associated with the beneficial ownership of such Common Shares
      shall at such time vest with such Person or Persons. The Conversion Notice
      shall
      constitute a contract between the Holder and the Company, whereby the Holder
      shall be deemed to subscribe for the number of Common Shares which it will
      be
      entitled to receive upon such conversion and, in payment and satisfaction of
      such subscription (and for any cash adjustment to which it is entitled pursuant
      to Section 3.4), to surrender this Debenture and to release the Company from
      all
      liability thereon (except if and to the extent that any Principal Amount thereof
      remains unconverted). No cash payment aggregating less than $1.00 shall be
      required to be given unless specifically requested by the
      Holder.


    
      	
              ___________________

              Initials

            	 	
               ____________________

              Initials

            


    

    
      
        
        

      

      
        7

        
          

        

      

      
        
        

      

    

     

    (b) If,
      at
      any time after the date of this Debenture, (i) the Company wrongfully
      challenges, disputes or denies the right of the Holder hereof to effect the
      conversion of this Debenture into Common Shares or otherwise wrongfully
      dishonors or rejects any Conversion Notice delivered in accordance with this
      Section 3.2 or (ii) any third party who is not and has never been an Affiliate
      of the Holder commences any lawsuit or legal proceeding or otherwise asserts
      any
      claim before any court or public or governmental authority which seeks to
      challenge, deny, enjoin, limit, modify, delay or dispute the right of the Holder
      hereof to effect the conversion of this Debenture into Common Shares, then
      the
      Holder shall have the right, but not the obligation, by written notice to the
      Company, to require the Company to promptly redeem this Debenture for cash
      at
      one hundred and thirty-five (135%) of the Principal Amount thereof, together
      with all accrued and unpaid interest thereon to the date of redemption. Under
      any of the circumstances set forth above, the Company shall be responsible
      for
      the payment of all costs and expenses of the Holder, including reasonable legal
      fees and expenses, as and when incurred in defending itself in any such action
      or pursuing its rights hereunder (in addition to any other rights of the
      Holder).

     

    (c) To
      the
      fullest extent permitted by law, the Holder shall be entitled to exercise its
      conversion privilege notwithstanding the commencement of any case under the
      Bankruptcy Code. In the event the Company is a debtor under the Bankruptcy
      Code,
      the Company hereby waives to the fullest extent permitted any rights to relief
      it may have under 11 U.S.C. § 362 in respect of the Holder’s conversion
      privilege. The Company hereby waives to the fullest extent permitted any rights
      to relief it may have under 11 U.S.C. § 362 in respect of the conversion of this
      Debenture. The Company agrees, without cost or expense to the Holder, to take
      or
      consent to any and all action necessary to effectuate relief under 11 U.S.C.
§
362.

     

    SECTION
      3.3 Fractional
      Shares.
      No
      fractional Common Shares or scrip representing fractional Common Shares shall
      be
      delivered upon conversion of this Debenture. Instead of any fractional Common
      Shares which otherwise would be delivered upon conversion of this Debenture,
      the
      Company shall pay a cash adjustment in respect of such fraction in an amount
      equal to the same fraction multiplied by the Current Market Price on the
      Conversion Date. No cash payment of less than $1.00 shall be required to be
      given unless specifically requested by the Holder.

     

    SECTION
      3.4 Adjustments.
      The
      Conversion Price and the number of shares deliverable upon conversion of this
      Debenture are subject to adjustment from time to time as follows:

     

    (i) Reclassification,
      Etc.
      In case
      the Company shall reorganize its capital, reclassify its capital stock,
      consolidate or merge with or into another Person (where the Company is not
      the
      survivor or where there is a change in or distribution with respect to the
      Common Stock of the Company), sell, convey, transfer or otherwise dispose of
      all
      or substantially all its property, assets or business to another Person, or
      effectuate a transaction or series of related transactions in which more than
      fifty percent (50%) of the voting power of the Company is disposed of (each,
      a
“Fundamental
      Corporate Change”)
      and,
      pursuant to the terms of such Fundamental Corporate Change, shares of common
      stock of the successor or acquiring corporation, or any cash, shares of stock
      or
      other securities or property of any nature whatsoever (including
      warrants or other subscription or purchase rights) in addition to or in lieu
      of
      common stock of the successor or acquiring corporation (“Other
      Property”)
      are to
      be received by or distributed to the holders of Common Stock of the Company,
      then the Holder of this Debenture shall have the right thereafter, at its sole
      option, to (x) receive the number of shares of common stock of the successor
      or
      acquiring corporation or of the Company, if it is the surviving corporation,
      and
      Other Property as is receivable upon or as a result of such
      Fundamental Corporate Change by a holder of the number of shares of Common
      Stock
      into which the outstanding portion of this Debenture may be converted at the
      Conversion Price applicable immediately prior to such Fundamental Corporate
      Change or (y) require the Company, or such successor, resulting or
      purchasing corporation, as the case may be, to, without benefit of any
      additional consideration therefor, execute and deliver to the Holder a debenture
      with substantial identical rights, privileges, powers, restrictions and other
      terms as this Debenture in an amount equal to the amount outstanding under
      this
      Debenture immediately prior to such Fundamental Corporate Change. For purposes
      hereof, “common
      stock of the successor or acquiring corporation”
      shall
      include stock of such corporation of any class which is not preferred as to
      dividends or assets over any other class of stock of such corporation and which
      is not subject to prepayment and shall also include any evidences of
      indebtedness, shares of stock or other securities which are convertible into
      or
      exchangeable for any such stock, either immediately or upon the arrival of
      a
      specified date or the happening of a specified event and any warrants or other
      rights to subscribe for or purchase any such stock. The foregoing provisions
      shall similarly apply to successive Fundamental Corporate Changes. 

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        8

        
          

        

      

      
        
        

      

    

     

    SECTION
      3.5 Certain
      Conversion Limits.

     

    So
      long
      as any of the Principal Amount of this Debenture is outstanding, the Holder
      shall not have the right, and the Company shall not have the obligation, to
      convert any portion of this Debenture if, following a Conversion Notice from
      the
      Holder, the result would be that the Holder would be deemed the beneficial
      owner
      of more than 9.99% of the then Outstanding shares of Common Stock. Further,
      for
      a period of one year after the Closing Date, if and to the extent that, on
      any
      date, the mere holding by the Holder of this Debenture (regardless of the actual
      conversion of any portion thereof) would result in the Holder’s being deemed the
      beneficial owner of
      more
      than 9.99% of the then Outstanding shares of Common Stock, then in addition
      to
      the Holder having no right, and the Company having no obligation, to convert
      any
      portion of this Debenture as shall cause such Holder to be deemed the beneficial
      owner of more than 9.99% of the then Outstanding shares of Common Stock if
      any
      court of competent jurisdiction shall determine that the foregoing limitation
      is
      ineffective to prevent the Holder, by mere ownership of the Debenture, from
      being deemed the beneficial owner of more than 9.99% of the then Outstanding
      shares of Common Stock, then the Company shall prepay such portion of this
      Debenture as shall cause such Holder not to be deemed the beneficial owner
      of
      more than 9.99% of the then Outstanding shares of Common Stock. Upon such
      determination by a court of competent jurisdiction, the Holder shall have no
      interest in or rights under such portion of the Debenture. Any and all interest
      paid on or prior to the date of such determination shall be deemed interest
      paid
      on the remaining portion of this Debenture held by the Holder. 

     

    SECTION
      3.6 Surrender
      of Debentures.
      Upon
      any redemption of this Debenture pursuant to Sections 3.2, 3.5 or 6.2, or upon
      maturity pursuant to Section 2.4, the Holder shall either
      deliver this Debenture by hand to the Company at its principal executive offices
      or surrender the same to the Company at such address by nationally recognized
      overnight courier. Payment of the redemption price or the amount due on maturity
      specified in Section 2.4, shall be made by the Company to the Holder against
      receipt of this Debenture (as provided in this Section 3.5) by wire transfer
      of
      immediately available funds to such account(s) as the Holder shall specify
      by
      written notice to the Company. If payment of such redemption price is not made
      in full by the redemption date, or the amount due on maturity is not paid in
      full by the Maturity Date, the Holder shall again have the right to convert
      this
      Debenture as provided in Article 3 hereof or to declare an Event of
      Default.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        9

        
          

        

      

      
        
        

      

    

     

    ARTICLE
      4

    STATUS;
      RESTRICTIONS ON TRANSFER

     

    SECTION
      4.1 Status
      of Debenture.
      This
      Debenture constitutes a legal, valid and binding obligation of the Company,
      enforceable in accordance with its terms subject, as to enforceability, to
      general principles of equity and to principles of bankruptcy, insolvency,
      reorganization and other similar laws of general applicability relating to
      or
      affecting creditors’ rights and remedies generally.

     

    SECTION
      4.2 Restrictions
      on Transfer.
      This
      Debenture, and any Common Shares deliverable upon the conversion hereof, have
      not been registered under the Securities Act. The Holder by accepting this
      Debenture agrees that this Debenture and the shares of Common Stock to be
      acquired as interest on and upon conversion of this Debenture may not be
      assigned or otherwise transferred unless and until (i) the Company has received
      an opinion of counsel for the Company that this Debenture or such shares may
      be
      sold pursuant to an exemption from registration under the Securities Act or
      (ii)
      a registration statement relating to this Debenture or such shares has been
      filed by the Company and declared effective by the SEC. 

     

    Each
      certificate for shares of Common Stock deliverable hereunder shall bear a legend
      as follows unless and until such securities have been sold pursuant to an
      effective registration statement under the Securities Act:

     

    “The
      securities represented by this certificate have not been registered under the
      Securities Act of 1933, as amended (the “Securities Act”). The securities may
      not be offered for sale, sold or otherwise transferred except (i) pursuant
      to an
      effective registration statement under the Securities Act or (ii) pursuant
      to an
      exemption from registration under the Securities Act in respect of which the
      issuer of this certificate has received an opinion of counsel satisfactory
      to
      the issuer of this certificate to such effect. The securities are further
      subject to the terms of a Securities Purchase Agreement dated November 3, 2006,
      copies of which may be obtained at no cost by written request made by the holder
      of record of this certificate to the Secretary of the issuer of this certificate
      at the principal executive offices of the issuer of this
      certificate.”

     

    ARTICLE
      5

    COVENANTS

     

    SECTION
      5.1 Conversion.
      The
      Company shall cause the transfer agent, not later than two (2) Business Days
      after the Conversion Date, to issue and deliver to the Holder the requisite
      shares of Common Stock Issued at Conversion. Such delivery shall be by
      electronic transfer if a Registration Statement covering the Common Stock has
      been declared effective by the SEC.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        10

        
          

        

      

      
        
        

      

    

    SECTION
      5.2 Notice
      of Default.
      If any
      one or more events occur which constitute or which, with notice, lapse of time,
      or both, would constitute an Event of Default, the Company shall forthwith
      give
      notice to the Holder, specifying the nature and status of the Event of Default
      or such other event(s), as the case may be.

     

    SECTION
      5.3 Payment
      of Obligations.
      So long
      as this Debenture shall be outstanding, the Company shall pay, extend, or
      discharge at or before maturity, all its respective material obligations and
      liabilities, including, without limitation, tax liabilities, except where the
      same may be contested in good faith by appropriate proceedings.

     

    SECTION
      5.4 Compliance
      with Laws.
      So long
      as this Debenture shall be outstanding, the Company shall comply with all
      applicable laws, ordinances, rules, regulations and requirements of governmental
      authorities, except for such noncompliance which would not have a material
      adverse effect on the business, properties, prospects, condition (financial
      or
      otherwise) or results of operations of the Company and the
      Subsidiaries.

     

    SECTION
      5.5 Inspection
      of Property, Books and Records.
      So long
      as this Debenture shall be outstanding, the Company shall keep proper books
      of
      record and account in which full, true and correct entries shall be made of
      all
      material dealings and transactions in relation to its business and activities
      and shall permit representatives of the Holder at the Holder’s expense to visit
      and inspect any of its respective properties, to examine and make abstracts
      from
      any of its respective books and records, not reasonably deemed confidential
      by
      the Company, and to discuss its respective affairs, finances and accounts with
      its respective officers and independent public accountants, all at such
      reasonable times and as often as may reasonably be desired.

     

    SECTION
      5.6 Right
      of First Refusal on Other Financing. Subsequent
      to the date on which the Company’s registration statement filed pursuant to the
      Registration Rights Agreement becomes effective with the SEC, in the event
      that
      the Company obtains a commitment for any other financing (either debt, equity,
      or a combination thereof) which is to close during the term of this Debenture,
      Holder shall be entitled to a right of first refusal to enable it to, at
      Holder’s option, match the terms of the other financing. The Company shall
      deliver to Holder, at least 10 days prior to the proposed closing date of such
      transaction, written notice describing the proposed transaction, including
      the
      terms and conditions thereof, and providing Holder an option during the 10
      day
      period following delivery of such notice to provide the financing being offered
      in such transaction on the same terms as contemplated by such
      transaction.

     

    ARTICLE
      6

    EVENTS
      OF DEFAULT; REMEDIES

     

    SECTION
      6.1 Events
      of Default.
      “Event
      of Default”
      wherever
      used herein means any one of the following events:

     

    (i) the
      Company shall default in the payment of principal of or interest on this
      Debenture as and when the same shall be due and payable and, in the case of
      an
      interest payment default, such default shall continue for five (5) Business
      Days
      after the date such interest payment was due, or the Company shall fail to
      perform or observe any other covenant, agreement, term, provision, undertaking
      or commitment under this Debenture, the Securities Purchase Agreement or the
      Registration Rights Agreement and such default shall continue for a period
      of
      ten (10) Business Days after the delivery to the Company of written notice
      that
      the Company is in default hereunder or thereunder; 

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        11

        
          

        

      

      
        
        

      

    

     

    (ii) any
      of
      the representations or warranties made by the Company herein, in the Securities
      Purchase Agreement, the Registration Rights Agreement or in any certificate
      or
      financial or other written statements heretofore or hereafter furnished by
      or on
      behalf of the Company in connection with the execution and delivery of this
      Debenture, the Securities Purchase Agreement or the Registration Rights
      Agreement shall be false or misleading in a material respect on the Closing
      Date; 

     

    (iii) under
      the
      laws of any jurisdiction not otherwise covered by clauses (iv) and (v) below,
      the Company or any Subsidiary (A) becomes insolvent or generally not able to
      pay
      its debts as they become due, (B) admits in writing its inability to pay its
      debts generally or makes a general assignment for the benefit of creditors,
      (C)
      institutes or has instituted against it any proceeding seeking (x) to adjudicate
      it a bankrupt or insolvent, (y) liquidation, winding-up, reorganization,
      arrangement, adjustment, protection, relief or composition of it or its debts
      under any law relating to bankruptcy, insolvency, reorganization or relief
      of
      debtors including any plan of compromise or arrangement or other corporate
      proceeding involving or affecting its creditors or (z) the entry of an order
      for
      relief or the appointment of a receiver, trustee or other similar person for
      it
      or for any substantial part of its properties and assets, and in the case of
      any
      such official proceeding instituted against it (but not instituted by it),
      either the proceeding remains undismissed or unstayed for a period of sixty
      (60)
      calendar days, or any of the actions sought in such proceeding (including the
      entry of an order for relief against it or the appointment of a receiver,
      trustee, custodian or other similar official for it or for any substantial
      part
      of its properties and assets) occurs or (D) takes any corporate action to
      authorize any of the above actions; 

     

    (iv) the
      entry
      of a decree or order by a court having jurisdiction in the premises adjudging
      the Company or any Subsidiary a bankrupt or insolvent, or approving as properly
      filed a petition seeking reorganization, arrangement, adjustment or composition
      of or in respect of the Company under the Bankruptcy Code or any other
      applicable Federal or state law, or appointing a receiver, liquidator, assignee,
      trustee or sequestrator (or other similar official) of the Company or of any
      substantial part of its property, or ordering the winding-up or liquidation
      of
      its affairs, and any such decree or order continues and is unstayed and in
      effect for a period of sixty (60) calendar days;

     

    (v) the
      institution by the Company or any Subsidiary of proceedings to be adjudicated
      a
      bankrupt or insolvent, or the consent by it to the institution of bankruptcy
      or
      insolvency proceedings against it, or the filing by it of a petition or answer
      or consent seeking reorganization or relief under the Bankruptcy Code or any
      other applicable federal or state law, or the consent by it to the filing of
      any
      such petition or to the appointment of a receiver, liquidator, assignee, trustee
      or sequestrator (or other similar official) of the Company or of any substantial
      part of its property, or the making by it of an assignment for the benefit
      of
      creditors, or the admission by it in writing of its inability to pay its debts
      generally as and when they become due, or the taking of corporate action by
      the
      Company in furtherance of any such action; 

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        12

        
          

        

      

      
        
        

      

    

     

    (vi) a
      final
      judgment or final judgments for the payment of money shall have been entered
      by
      any court or courts of competent jurisdiction against the Company and remains
      undischarged for a period (during which execution shall be effectively stayed)
      of thirty (30) days, provided
      that the
      aggregate amount of all such judgments at any time outstanding (to the extent
      not paid or to be paid, as evidenced by a written communication to that effect
      from the applicable insurer, by insurance) exceeds One Hundred Thousand Dollars
      ($100,000);

     

    (vii) it
      becomes unlawful for the Company to perform or comply with its obligations
      under
      this Debenture, the Securities Purchase Agreement or the Registration Rights
      Agreement in any respect;

     

    (viii) the
      Common Shares shall no longer be traded in the over the counter market via
      the
      Pink Sheets or not otherwise be listed for trading on the NASDAQ OTCBB (the
      “Trading
      Market”
      or, to
      the extent the Company becomes eligible to list its Common Stock on any other
      national security exchange or quotation system, upon official notice of listing
      on any such exchange or system, as the case may be, it shall be the “Trading
      Market”)
      or
      suspended from trading on the Trading Market, and shall not be reinstated,
      relisted or such suspension lifted, as the case may be, within five (5) days
      or;

     

    (ix) the
      Company shall default (giving effect to any applicable grace period) in the
      payment of principal or interest as and when the same shall become due and
      payable, under any indebtedness, individually or in the aggregate, of more
      than
      One Hundred Thousand Dollars ($100,000);

     

    SECTION
      6.2 Acceleration
      of Maturity; Rescission and Annulment.
      If an
      Event of Default occurs and is continuing, then and in every such case the
      Holder may, by a notice in writing to the Company, rescind any outstanding
      Conversion Notice and declare that all amounts owing or otherwise outstanding
      under this Debenture are immediately due and payable and upon any such
      declaration this Debenture shall become immediately due and payable in cash
      at a
      price of one hundred and thirty-five percent (135%) of the Principal Amount
      thereof, together with all accrued and unpaid interest thereon to the date
      of
      payment; provided,
      however,
      in the
      case of any Event of Default described in clauses (iii), (iv), (v) or (vii)
      of
      Section 6.1, such amount automatically shall become immediately due and payable
      without the necessity of any notice or declaration as aforesaid.

     

    SECTION
      6.3 Late
      Payment Penalty.
      If any
      portion of the principal of or interest on this Debenture shall not be paid
      within ten (10) days of when it is due, the Discount Multiplier under this
      Debenture shall decrease by one percentage point (1%) for all conversions of
      this Debenture thereafter.

     

    SECTION
      6.4 Maximum
      Interest Rate. Notwithstanding
      anything herein to the contrary, if at any time the applicable interest rate
      as
      provided for herein shall exceed the maximum lawful rate which may be contracted
      for, charged, taken or received by the Holder in accordance with any applicable
      law (the “Maximum
      Rate”),
      the
      rate of interest applicable to this Debenture shall be limited to the Maximum
      Rate. To the greatest extent permitted under applicable law, the Company hereby
      waives and agrees not to allege or claim that any provisions of this Note could
      give rise to or result in any actual or potential violation of any applicable
      usury laws.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        13

        
          

        

      

      
        
        

      

    

     

    SECTION
      6.5 Remedies
      Not Waived.
      No
      course of dealing between the Company and the Holder or any delay in exercising
      any rights hereunder shall operate as a waiver by the Holder.

     

    SECTION
      6.6 Remedies. The
      Company acknowledges that a breach by it of its obligations hereunder will
      cause
      irreparable harm to the Holder, by vitiating the intent and purpose of the
      transaction contemplated hereby. Accordingly, the Company acknowledges that
      the
      remedy at law for a breach of its obligations under this Debenture will be
      inadequate and agrees, in the event of a breach or threatened breach by the
      Company of the provisions of this Debenture, that the Holder shall be entitled
      to all other available remedies at law or in equity, and in addition to the
      penalties assessable herein, to an injunction or injunctions restraining,
      preventing or curing any breach of this Debenture and to enforce specifically
      the terms and provisions thereof, without the necessity of showing economic
      loss
      and without any bond or other security being required. 

     

    SECTION
      6.7 Payment
      of Certain Amounts. Whenever
      pursuant to this Debenture the Company is required to pay an amount in excess
      of
      the Principal Amount plus accrued and unpaid interest, the Company and the
      Holder agree that the actual damages to the Holder from the receipt of cash
      payment on this Debenture may be difficult to determine and the amount to be
      so
      paid by the Company represents stipulated damages and not a penalty and is
      intended to compensate the Holder in part for loss of the opportunity to convert
      this Debenture and to earn a return from the sale of shares of Common Stock
      acquired upon conversion of this Debenture at a price in excess of that price
      paid for such shares pursuant to this Debenture. The Company and the Holder
      hereby agree that such amount of stipulated damages is not disproportionate
      to
      the possible loss to the Holder from the receipt of a cash payment without
      the
      opportunity to convert this Debenture into shares of Common Stock.

     

    ARTICLE
      7

    MISCELLANEOUS

     

    SECTION
      7.1 Notice
      of Certain Events.
      In the
      case of the occurrence of any event described in Section 3.4 of this Debenture,
      the Company shall cause to be mailed to the Holder of this Debenture at its
      last
      address as it appears in the Company’s security registry, at least twenty (20)
      days prior to the applicable record, effective or expiration date hereinafter
      specified (or, if such twenty (20) days’ notice is not possible, at the earliest
      possible date prior to any such record, effective or expiration date), a notice
      thereof, including, if applicable, a statement of the date on which such
      reclassification, consolidation, merger, sale, transfer, dissolution,
      liquidation or winding-up is expected to become effective, and the date as
      of
      which it is expected that holders of record of Common Stock will be entitled
      to
      exchange their shares for securities, cash or other property deliverable upon
      such reclassification, consolidation, merger, sale transfer, dissolution,
      liquidation or winding-up.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        14

        
          

        

      

      
        
        

      

    

     

    SECTION
      7.2 Register.
      The
      Company shall keep at its principal office a register in which the Company
      shall
      provide for the registration of this Debenture. Upon any transfer of this
      Debenture in accordance with Articles 2 and 4 hereof, the Company shall register
      such transfer on the Debenture register.

     

    SECTION
      7.3 Withholding.
      To the
      extent required by applicable law, the Company may withhold amounts for or
      on
      account of any taxes imposed or levied by or on behalf of any taxing authority
      in the United States having jurisdiction over the Company from any payments
      made
      pursuant to this Debenture.

     

    SECTION
      7.4 Transmittal
      of Notices.
      Except
      as may be otherwise provided herein, any notice or other communication or
      delivery required or permitted hereunder shall be in writing and shall be
      delivered personally, or sent by telecopier machine or by a nationally
      recognized overnight courier service, and shall be deemed given when so
      delivered personally, or by telecopier machine or overnight courier service
      as
      follows:

     

    (1) If
      to the Company, to:

    


    3DIcon
      Corporation

    7507
      Sandusky Ave.

    Tulsa,
      Oklahoma 74136

    Telephone: 918-492-5082

    Facsimile: 918-492-5367

    


    With
      a copy to:

    


    John
      M. O’Connor, Esq.

    Newton,
      O’Connor, Turner &
Ketchum

    15
      W. Sixth Street, Suite
      2700

    Tulsa,
      Oklahoma 74119

    Telephone: 918-587-0101

    Facsimile: 918-587-0102

    


    (2) If
      to the
      Holder, to:

     

    Golden
      Gate Investors, Inc.

    7817
      Herschel Avenue, Suite 200

    La
      Jolla,
      California 92037

    Telephone: 858-551-8789

    Facsimile: 858-551-8779

     

    Each
      of
      the Holder or the Company may change the foregoing address by notice given
      pursuant to this Section 7.4.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        15

        
          

        

      

      
        
        

      

    

     

    SECTION
      7.5 Attorneys’
      Fees.
      Should
      any party hereto employ an attorney for the purpose of enforcing or construing
      this Debenture, or any judgment based on this Debenture, in any legal proceeding
      whatsoever, including insolvency, bankruptcy, arbitration, declaratory relief
      or
      other litigation, the prevailing party shall be entitled to receive from the
      other party or parties thereto reimbursement for all reasonable attorneys'
      fees
      and all reasonable costs, including but not limited to service of process,
      filing fees, court and court reporter costs, investigative costs, expert witness
      fees, and the cost of any bonds, whether taxable or not, and that such
      reimbursement shall be included in any judgment or final order issued in that
      proceeding. The "prevailing party" means the party determined by the court
      to
      most nearly prevail and not necessarily the one in whose favor a judgment is
      rendered. 

     

    SECTION
      7.6 Governing
      Law.
      This
      Debenture shall be governed by, and construed in accordance with, the laws
      of
      the State of California (without giving effect to conflicts of laws principles).
      With respect to any suit, action or proceedings relating to this Debenture,
      the
      Company irrevocably submits to the exclusive jurisdiction of the courts of
      the
      State of California sitting in San Diego and the United States District Court
      located in the City of San Diego and hereby waives, to the fullest extent
      permitted by applicable law, any claim that any such suit, action or proceeding
      has been brought in an inconvenient forum. Subject to applicable law, the
      Company agrees that final judgment against it in any legal action or proceeding
      arising out of or relating to this Debenture shall be conclusive and may be
      enforced in any other jurisdiction within or outside the United States by suit
      on the judgment, a certified copy of which judgment shall be conclusive evidence
      thereof and the amount of its indebtedness, or by such other means provided
      by
      law.

     

    SECTION
      7.7 Waiver
      of Jury Trial.
      To the
      fullest extent permitted by law, each of the parties hereto hereby knowingly,
      voluntarily and intentionally waives its respective rights to a jury trial
      of
      any claim or cause of action based upon or arising out of this Debenture or
      any
      other document or any dealings between them relating to the subject matter
      of
      this Debenture and other documents. Each party hereto (i) certifies that neither
      of their respective representatives, agents or attorneys has represented,
      expressly or otherwise, that such party would not, in the event of litigation,
      seek to enforce the foregoing waivers and (ii) acknowledges that it has been
      induced to enter into this Debenture by, among other things, the mutual waivers
      and certifications herein.

     

    SECTION
      7.8 Headings.
      The
      headings of the Articles and Sections of this Debenture are inserted for
      convenience only and do not constitute a part of this Debenture.

     

    SECTION
      7.9 Payment
      Dates.
      Whenever any payment hereunder shall be due on a day other than a Business
      Day,
      such payment shall be made on the next succeeding Business Day.

     

    SECTION
      7.10 Binding
      Effect.
      Each
      Holder by accepting this Debenture agrees to be bound by and comply with the
      terms and provisions of this Debenture.

     

    SECTION
      7.11 No
      Stockholder Rights.
      Except
      as otherwise provided herein, this Debenture shall not entitle the Holder to
      any
      of the rights of a stockholder of the Company, including, without limitation,
      the right to vote, to receive dividends and other distributions, or to receive
      any notice of, or to attend, meetings of stockholders or any other proceedings
      of the Company, unless and to the extent converted into shares of Common Stock
      in accordance with the terms hereof.

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        16

        
          

        

      

      
        
        

      

    

     

    SECTION
      7.12 Facsimile
      Execution.
      Facsimile execution shall be deemed originals.

     

    IN
      WITNESS WHEREOF, the Company has caused this Debenture to be signed by its
      duly
      authorized officer on the date of this Debenture.

    

      
        	
                3DIcon
                  Corporation

              	 
	 	 
	 	 
	By:
                	
                /s/Martin
                  Keating

              	 
	
                Name:
                  Martin Keating

              	 
	
                Title:
                  Chief Executive Officer

              	 


      

    

     

    
      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        17

        
          

        

      

      
        
        

      

    

     

    EXHIBIT A

    DEBENTURE
      CONVERSION NOTICE

    


    TO: 3DIcon
      Corporation

     

    The
      undersigned owner of this Convertible Debenture due November ___, 2010 (the
“Debenture”)
      issued
      by 3DIcon Corporation (the “Company”)
      hereby
      irrevocably exercises its option to convert $__________ Principal Amount of
      the
      Debenture into shares of Common Stock in accordance with the terms of the
      Debenture. The undersigned hereby instructs the Company to convert the portion
      of the Debenture specified above into shares of Common Stock Issued at
      Conversion in accordance with the provisions of Article 3 of the Debenture.
      The
      undersigned directs that the Common Stock and certificates therefor deliverable
      upon conversion, the Debenture reissued in the Principal Amount not being
      surrendered for conversion hereby, [the check or shares of Common Stock in
      payment of the accrued and unpaid interest thereon to the date of this Notice,]
      together with any check in payment for fractional Common Stock, be registered
      in
      the name of and/or delivered to the undersigned unless a different name has
      been
      indicated below. All capitalized terms used and not defined herein have the
      respective meanings assigned to them in the Debenture. The conversion pursuant
      hereto shall be deemed to have been effected at the date and time specified
      below, and at such time the rights of the undersigned as a Holder of the
      Principal Amount of the Debenture set forth above shall cease and the Person
      or
      Persons in whose name or names the Common Stock Issued at Conversion shall
      be
      registered shall be deemed to have become the holder or holders of record of
      the
      Common Shares represented thereby and all voting and other rights associated
      with the beneficial ownership of such Common Shares shall at such time vest
      with
      such Person or Persons.

     

    In
      the
      event that, at the time this Conversion Notice is received by the Company,
      there
      is not then in effect a registration statement on file with the Securities
      and
      Exchange Commission covering the Common Stock issued upon Conversion, then
      the
      undersigned hereby reaffirms all representations contained in Section II of
      the
      Securities Purchase Agreement dated November 3, 2006 as if such representations
      were made on the date hereof.

     

    Date
      and
      time: __________________

     

    ______________________________

     

    By:
      ___________________________

     

    Title:
      _________________________

     

    
      
        
        

      

      
        A-1

        
          

        

      

      
        
        

      

    

     

    Fill
      in
      for registration of Debenture:

    Please
      print name and address

    (including
      ZIP code number):

     

    
      ______________________________

       

      
        ______________________________

         

        
          ______________________________

        

      

    

    

      
        	
                ___________________

                Initials

              	 	
                 ____________________

                Initials

              


      

    

    
      
        
        

      

      
        2