US PATENT SUBCLASS 528 / 903
POLYMERIZING OR PROCESSING AN ISOCYANATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS


Current as of: June, 1999
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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

903POLYMERIZING OR PROCESSING AN ISOCYANATE UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS


DEFINITION

Classification: 528/903

Subject matter involving the treating of a polymer derived from at least one -N=C=X- containing reactant (X is a chalcogen atom) or the polymerizing of at least one -N=C=X- containing reactant in the substantial absence of water, e.g., under anhydrous conditions.