Exhibit 4.1
	
	NUMBER
SHARES
COUNTERSIGNED:
BROADRIDGE CORPORATE ISSUER SOLUTIONS, INC.
TRANSFER AGENT
BY:
AUTHORIZED SIGNATURE
DATED:
INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE
SEE REVERSE FOR CERTAIN DEFINITIONS
This CerTifies ThaT:
is The owner of
CoMMon sToCK
FULLY PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF $0.01 PAR VALUE EACH OF
BKV Corporation
transferable on the books of the Corporation by the holder thereof in person or by duly authorized attorney upon surrender of
this certificate duly endorsed or assigned. This certificate and the shares represented hereby are subject to the laws of the State of
Delaware, and to the Certificate of Incorporation and Bylaws of the Corporation, as now or hereafter amended.

 This certificate is not valid until countersigned by the Transfer Agent.

WITNESS the facsimile seal of the Corporation and the facsimile signatures of its duly authorized officers.
CHRISTOPHER P. KALNIN
CHIEF EXECUTIVE OFFICER
JOHN T. JIMENEZ
CHIEF FINANCIAL OFFICER
SPECIMEN
SPECIMEN
SPECIMEN - NOT NEGOTIABLE
SPECIMEN
not negotiable






	
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  The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though they
were written out in full according to applicable laws or regulations:
TEN COM  - as tenants in common     UNIF GIFT MIN ACT - ....................Custodian....................
TEN ENT - as tenants by the entireties
(Cust)                     (Minor)
JT TEN  - as joint tenants with right of          under Uniform Gifts to Minors
   survivorship and not as tenants               Act ...................................................
             in common
(State)

Additional abbreviations may also be used though not in the above list.
For Value Received,



hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
 IDENTIFYING NUMBER OF ASSIGNEE


(
PLEASE PRINT OR TYPE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)




Shares
of the stock represented by the within Certificate, and do hereby irrevocably constitute and appoint

 Attorney
to transfer the said stock on the books of the within named Corporation with full power of substitution in the premises.
Dated


NOTICE:
THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE
OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATSOEVER.

Signature(s) Guaranteed
By

The Signature(s) must be guaranteed by an eligible guarantor institution
(Banks, Stockbrokers, Savings and Loan Associations and Credit Unions
with membership in an approved Signature Guarantee Medallion Program),
pursuant to SEC Rule 17Ad-15.
THE CORPORATION WILL FURNISH TO ANY STOCKHOLDER, UPON REQUEST AND WITHOUT CHARGE, A FULL STATEMENT OF THE DESIGNATIONS,
RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF THE SHARES OF EACH CLASS AND SERIES AUTHORIZED TO BE ISSUED, SO FAR AS THE
SAME HAVE BEEN DETERMINED, AND OF THE AUTHORITY, IF ANY, OF THE BOARD TO DIVIDE THE SHARES INTO CLASSES OR SERIES AND TO
DETERMINE AND CHANGE THE RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF ANY CLASS OR SERIES. SUCH REQUEST MAY BE MADE
TO THE SECRETARY OF THE CORPORATION OR TO THE TRANSFER AGENT NAMED ON THIS CERTIFICATE.