US PATENT SUBCLASS 525 / 454
.~.~.~.~ Mixed with carboxylic acid or derivative reactant or polymer derived therefrom; or with heterocyclic reactant containing more than one heterocyclic ring; or polymer therefrom

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {4}
50  DF  .~ MIXING OF TWO OR MORE SOLID POLYMERS; MIXING OF SOLID POLYMER OR SICP WITH SICP OR SPFI; MIXING OF SICP WITH AN ETHYLENIC AGENT; MIXING OF SOLID POLYMER WITH A CHEMICAL TREATING OR ETHYLENIC AGENT; OR PROCESSES OF FORMING OR REACTING; OR THE RESULTANT PRODUCT OF ANY OF THE ABOVE OPERATIONS {32}
452  DF  .~.~ Solid polymer derived from -N=C=X reactant (X is chalcogen) {1}
453  DF  .~.~.~ Solid polymer derived from -N=C=X reactant and polyhydroxy reactant {6}
454.~.~.~.~ Mixed with carboxylic acid or derivative reactant or polymer derived therefrom; or with heterocyclic reactant containing more than one heterocyclic ring; or polymer therefrom

DEFINITION

Classification: 525/454

Mixed with carboxylic acid or derivative reactant or polymer derived therefrom; or with heterocyclic reactant containing more than one heterocyclic ring; or polymer therefrom:

(under subclass 453) Subject matter wherein a solid polymer derived fron a -N=C=X or blocked -N=C=X reactant and polyhydroxy reactant is mixed with a carboxylic acid or derivative reactant or polymer derived therefrom, or with a hetercyclic reactant containing more than one heterocyclic ring or polymer thereof, e.g., polyurethanes mixed with a carboxylic acid reactant, etc.