WARRANT AGREEMENT FOR "CLASS B WARRANTS" AGREEMENT (this "Agreement") dated as of August 9, 1996, by and between XYTRONYX, INC., a Delaware corporation (the "Company") and AMERICAN STOCK TRANSFER & TRUST COMPANY, as warrant agent (the "Warrant...Warrant Agreement • November 13th, 1996 • Xytronyx Inc • In vitro & in vivo diagnostic substances • New York
