Document:

April 18, 2011

 

Vatsala Sharma

22338 La Quilla Drive

Los Angeles, CA 91311

 

		Re:	Eos Petro, Inc. Loan

 

Dear Vatsala Sharma:

 

Reference is made to the Secured
Promissory Note dated February 15, 2012, as subsequently amended (the “Loan”) by and between Eos Petro,
Inc. (“Eos”) and Vatsala Sharma (“Lender,” collectively referred to
with Eos as the “Parties”).

 

You are hereby requested in this
letter (this “Letter Agreement”) to indicate your agreement to, and acknowledgement of,
the following:

 

		1.	The Parties hereby agree that the maturity date of the Loan is extended to August 31, 2013.

 

		2.	The Parties hereby acknowledge that the following is a complete and accurate summary of the amount
loaned to Eos under the Loan, the interest accruing thereon, the maturity date of the Loan, as amended by this Letter Agreement,
and any consideration given or promised to be given to Lender under the Loan through the date first written above:

 

On February 15 and 16, 2012, Eos executed a series
of agreements with Lender in order to secure a $400,000 bridge loan. This amount was subsequently increased to $600,000 (the “Loan”).
This Loan bears interest at 18% per year, and the Loan’s maturity date is August 31, 2013. The Loan is personally guaranteed
by Mr. Konstant, Eos’ CEO, and some of his personal assets. It is also secured by a first priority security interest in Eos’
Works Property and any of Eos’ newly-acquired assets. As additional consideration for the Loan, Lender received 400,000 restricted
shares of Eos’ common stock. These shares of common stock were subsequently converted into an equal number of restricted
shares of Series B preferred stock of Cellteck, Inc., Eos’ parent company, on October 12, 2012 pursuant to the terms of a
merger agreement between Cellteck, Inc. and Eos. If the Loan is not repaid by the maturity date, Cellteck, Inc. will issue to Lender
275,000 restricted shares of its common stock.

 

[Remainder of this page intentionally
left blank. Signature page follows.]

 

    	Page 1

    	 

    

 

Please acknowledge your agreement
to, and acceptance of, the foregoing by signing this Letter Agreement below. Please return a signed copy to the undersigned, it
being agreed that this Letter Agreement may be executed in counterparts and signatures received by electronic transmission shall
have the same effect as original signatures.

 

Sincerely,

 

NIKOLAS KONSTANT, signing in his individual
capacity and as the CEO of Eos Petro, Inc., a Delaware corporation

 

	/s/ Nikolas Konstant

 

ACKNOWLEDGED AND AGREED TO ON APRIL 24, 2013 BY:

 

	VATSALA SHARMA	 
	 	 
	By: 	/s/ Vatsala Sharma	 
	Name:	Vatsala Sharma	 
	Title:	Owner	 

 

    	Page 2April 25, 2013

 

		Re:	Eos Petro, Inc./Konstant Loan

 

To Whom It May Concern at RT Holdings LLC:

 

Reference is made to the Promissory
Note dated October 24, 2011, as subsequently amended (the “Loan”) by Eos Petro, Inc., a Delaware corporation
(“Eos”) and Mr. Nikolas Konstant (“Konstant”) in favor of RT Holdings LLC,
an Arizona limited liability company (“Lender”).

 

You are hereby requested in this
letter (this “Letter Agreement”) to indicate your agreement to, and acknowledgement of,
the following:

 

		1.	On October 24, 2011, Eos and Konstant, jointly and severally, borrowed $200,000 from Lender pursuant
to the Loan. The principal amount of the Loan was subject to interest at the rate of 24% per annum commencing on October 24, 2011.
In addition to repaying in full the principal amount owed to Lender, plus interest, Eos and Konstant agreed to (i) pay Lender a
single additional fee of $10,000 on the maturity date of the loan, and (ii) issue to Lender 220,000 shares of EOS Petro, Inc. common
stock.

		2.	EOS and/or Konstant have made the following payments towards the obligations owing to Lender arising
out of the Loan: $15,000 on 2/11/2013, $25,000 on 2/19/2013, $25,000 on 2/26/2013, $5,000 on 3/18/13, and $25,000 on 4/22/13. The
balance due as of the date of this Letter Agreement is $191,966.49 in principal, plus $378.67 in accrued but unpaid interest.

		3.	On or before June 30, 2013, EOS and Konstant have committed to making another payment of $25,000
towards the remaining obligations arising out of the Loan. Provided such payment is made, Lender will forbear from enforcing any
remaining obligations arising out of the Loan until August 31, 2013, at which time all amounts owing will be payable in full.

 

Please acknowledge your agreement
to, and acceptance of, the foregoing by signing this Letter Agreement below. Please return a signed copy to the undersigned, it
being agreed that this Letter Agreement may be executed in counterparts and signatures received by electronic transmission shall
have the same effect as original signatures.

 

Sincerely,

 

NIKOLAS KONSTANT, signing in his individual
capacity and as the CEO of Eos Petro, Inc., a Delaware corporation

 

/s/ Nikolas Konstant

 

ACKNOWLEDGED AND AGREED TO ON APRIL 25, 2013 BY:

 

	RT HOLDINGS LLC	 
	 	 
	By:	/s/ George Winney	 
	Name:	George M. Winney	 
	Title:	Attorney for RT Holdings, LLC	 

 

    	Page 1RENEWAL AND EXTENSION AGREEMENT

 

	THE STATE OF TEXAS	 	§ 	 
	 	 	§ 	KNOW ALL MEN BY THESE PRESENTS:
	COUNTY OF BEXAR	 	§	 

 

THIS
RENEWAL AND EXTENSION AGREEMENT ("Agreement") is made and entered into effective the 30th day of April, 2013, by and
among 1975 BABCOCK ROAD, LLC, a Texas limited liability company ("Lender"), EOS PETRO, INC., a Delaware corporation ("Borrower'')
and NIKOLAS KONSTANT, an individual residing in Los Angeles, California ("Guarantor").

 

W I T N E S S E T H:

 

WHEREAS,
Lender is the owner and holder of one certain Loan Agreement and Secured Promissory Note ("Note") dated August 2, 2012,
in the original principal amount of THREE HUNDRED THOUSAND DOLLARS (US$$300,000.00), executed by Borrower, payable to the order
of Lender in accordance with the terms set forth therein;

 

WHEREAS,
the Note is secured by a Leasehold Mortgage, Assignment, Security Agreement and Fixture Filing executed by Borrower of even date
therewith, ("Mortgage”), said Mortgage covering certain real property located in Edwards County, Illinois, and improvements
situated thereon, all as more particularly described in the Mortgage (the “Property”);

 

WHEREAS,
by Personal Guaranty Agreement dated August 1, 2012, Guarantor personally guaranteed the obligations of Borrower under the Note
("Note Guaranty”);

 

WHEREAS,
on August 3, 2012, Borrower as tenant entered into that certain Lease Agreement with Lender as landlord whereby Borrower leased
approximately 7,500 square feet of space in the two-story medical office building situated at 1975 Babcock Road, San Antonio, Texas
from Lender for a term of thirty-six (36) months, upon such other terms and conditions as more specifically set forth therein ("Lease");

 

WHEREAS,
Guarantor personally guaranteed the obligations of Borrower under the Lease pursuant to the terms of that certain Lease Guaranty
dated August 3, 2012 (“Lease Guaranty”);

 

WHEREAS,
Borrower has requested that Lender modify certain provisions of the Note and Mortgage, all as hereinafter provided, and in consideration
thereof Borrower has made certain agreements with Lender as hereinafter more fully set forth;

 

WHEREAS,
Lender has agreed to such requests, subject to the terms and conditions set forth herein;

 

NOW,
THEREFORE, for and in consideration of TEN DOLLARS ($10.00) and other good and valuable consideration paid by each of the parties
to the other, the receipt and sufficiency of which are hereby acknowledged and confessed, Borrower and Lender agrees as follows:

 

1.            Acknowledgment
of Outstanding Note Balance. Borrower and Lender acknowledge and agree that the outstanding principal balance of the Note as
of the date hereof is THREE HUNDRED THOUSAND DOLLARS (US$$300,000.00).

 

    	 

    	 

    

 

2.            Acknowledgment
of Outstanding Note Balance. Borrower and Lender acknowledge and agree that the outstanding principal balance of the Note as
of the date herein is THREE HUNDRED THOUSAND DOLLARS (US$$$300,000.00).

 

3.            Extension
of Maturity Date. In consideration of the payment by Borrower to Lender of an extension fee of $5,000.00 which is due and payable
upon the execution herein by Borrower, the Note is hereby modified to provide that the Maturity Date (as defined in the Note) is
May 31, 2013. This extension fee is independent consideration to Lender for extending the maturity date of the Note and is not
applicable to the outstanding principal balance therein.

 

4.            Deferral
of Lease Enforcement. In consideration of the payment by Borrower to Lender of Base Rental currently owed under the Lease in
the amount of $15,000.00, which amount is due and payable upon the execution hereof by Borrower, Lender agrees to defer all enforcement
rights available to it under the Lease for borrower’s failure to pay Base Rental as required thereunder until May 32, 2013.
In addition, Lender grants Borrower a one-time right to terminate the Lease and all obligations of Borrower thereunder (including
the obligation to pay Base Rental then due and owing) upon payment to Lender of an early termination fee in the amount of $25,000.00.
Borrower must exercise this early termination right on or before May 32, 2013.

 

5.            Ratification
by Gurantor. By its execution hereof in the space provided below, Guarantor ratifies the terms hereof and confirms its continuing
liability to Lender under the Note Guaranty and the Lease Guaranty notwithstanding the renewal and extension of the Note as provided
herein.

 

6.            Borrower’s
Address. Borrower’s address for purposes of any notices required by the Note or Mortgage shall be as follows:

 

EOS Petro, Inc.

2049 Century Park East, Suite 3670

Los Angeles, CA 90067

 

7.            Miscellaneous.

 

(a)            As
modified hereby, the provisions of the Note, Mortgage, Lease, Note Guaranty and Lease Guaranty shall continue in full force and
effect, and Borrower and Guarantor acknowledge and reaffirm their liability to Lender thereunder (as applicable). In the event
of an inconsistency between this Agreement and the terms of the Note, Mortgage, Lease, Note Guaranty and Lease Guaranty, this Agreement
shall govern.

 

(b)            Any
default by Borrower in the performance of its obligations herein contained shall constitute a default under the Note, Mortgage,
Lease, Note Guaranty, and shall allow Lender to exercise all of its remedies set forth in said documents.

 

(c)            Lender
does not, by its execution of this Agreement, waive any rights it may have against any person not a party hereto.

 

(d)            This
Agreement may be executed in multiple counterparts, each of which shall constitute an original instrument, but all of which shall
constitute one and the same agreement.

 

(e)            Borrower
agrees to pay Lender’s legal fees in connection herewith in the amount of $500.00. Such payment shall be due and payable
upon the execution hereof by Borrower.

 

    	Page2

    	 

    

 

EXECUTED
as of the day and year first above written.

 

	LENDER:	 	BORROWER:	 
	 	 	 	 
	1975 BABCOCK ROAD, LLC,	 	EOS PETRO, INC.,	 
	a Texas limited liability company	 	a Delaware corporation	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	By:	/s/ John Roberts	 	By:	/s/ Nikolas Konstant	 
	 	John H. Roberts,	 	 	Nikolas Konstant,	 
	 	President	 	 	Chairman	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	 	 	 	Ratified
and Confirmed:

	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	 	 	 	 	 	 
	 	 	 	By:	/s/ Nikolas Konstant	 
	 	 	 	 	Nikolas Konstant,	 

 

    	Page3

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