October 3, 2003                                                      $100,000.00

                            REVOLVING PROMISSORY NOTE

      FOR VALUE RECEIVED, US Global Nanospace, Inc., hereafter referred to as
"Maker," promises to pay to the order of Julie Seaman, hereafter referred to as
"Holder," on or before June 30, 2004, the principal balance then outstanding,
together with accrued interest, provided that the maximum amount of principal
outstanding at any one time shall be ONE HUNDRED THOUSAND and NO/100 DOLLARS
($100,000.00) in lawful and legal tender of the United States of America.

      1. INTEREST RATE. Interest shall accrue daily on the outstanding principal
balance of at the rate of ten percent (10%) per annum, prior to maturity, and
after maturity at the maximum rate permitted by law, but in no event less than
eighteen percent (18%) per annum, together with interest on all amounts unpaid
on this Note from the date of this Note until maturity.

      2. PREPAYMENT. Maker shall have the right to prepay this Note in whole or
in part, at any time, and in such amounts as Maker shall so desire, and, from
time to time, as Maker sees fit. Interest shall immediately cease to accrue as
of the date of the prepayment on any amount of the principal that is so prepaid.
Any prepayment of the principal shall be credited to the payment of the
installments last accruing under this Note. Prepayment of a part of this Note
shall not affect the Maker's obligations to continue the regular payments stated
in this Note.

      3. DEFAULT. It is agreed that time is of the essence of this Note. If
default is made in any part of the principal or interest of this Note as it
becomes due and payable upon the performance of any obligation, agreement, or
covenant contained in any instrument securing payment of this Note, then the
Holder shall have the option to declare the entire unpaid balance of both the
principal and accrued interest immediately due and payable without notice, and
may foreclose any and all liens securing payments under this Note. Failure of
Holder to exercise this option shall not constitute a waiver of Holder's right
to exercise this option in the event of any subsequent default.

      It is further agreed that all past due principal and interest shall bear
interest from the date it is due until paid at the maximum lawful rate at which
the undersigned may legally contract under the laws of the State of Texas or
under other applicable federal laws. In any event, all past due principal and
interest shall bear an interest rate of no less than eighteen percent (18%).

      4. ATTORNEY'S FEES. In the event of default under this Note or under any
of the accompanying instruments securing payment of this Note, or if this Note
is placed in the hands of an attorney or agency for collection, regardless of
whether or not suit is filed, or if this Note is collected by suit or legal
process including, but not limited to, through the probate court or bankruptcy
proceedings, Maker agrees to pay reasonable attorney's fees and the expenses of
collection.


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      5. AMENDMENT AND WAIVER. This Note may be amended, or the terms hereof
waived, only in writing and having been executed by all of the parties to this
Note.

      6. USURY EXCLUSION. All agreements between Maker and Holder are expressly
limited so that under no circumstances or event shall the amount paid or agreed
to be paid to Holder for the use, forbearance, or detention of the money to be
lent under this Note exceed the maximum amount permissible under the applicable
federal and state usury laws. It is therefore the intention of Maker and Holder
to conform strictly to any state and federal usury laws applicable to this loan
transaction, and to permit the highest rate of interest according to law.
Therefore, in this Note, or in any of the documents securing payment of this
Note or otherwise relating to this Note, the aggregate of all interest and any
other charges constituting interest under the applicable law, contracted for,
chargeable, or receivable under this Note or otherwise in connection with this
loan transaction, shall under no circumstances exceed the maximum amount of
interest permitted by law.

      7. BINDING EFFECT. This Note binds, and shall inure to the benefit of, the
parties and their respective successor and assigns.

      8. CONSTRUCTION. This Note shall be governed by and construed under the
laws of the State of Texas and the laws of the United States of America.

      IN WITNESS WHEREOF, the undersigned has executed this Note on the date
first written above.


                                        US GLOBAL NANOSPACE, INC.


                                        By /s/ John Robinson
                                          --------------------------------------
                                          John Robinson, Chairman


                                                       MAKER

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