US PATENT SUBCLASS 525 / 440
.~.~.~.~.~ Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen); or wherein solid polymer is derived from a -N=C=X reactant and also a polycarboxylic acid or derivative and a polyhydroxy reactant

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}
418  DF  .~.~ Solid polymer derived from at least one carboxylic acid or derivative {3}
419  DF  .~.~.~ Solid polymer derived from at least one lactam; from an amino carboxylic acid or derivative; or from a polycarboxylic acid or derivative {3}
437  DF  .~.~.~.~ Solid polymer derived from polyhydroxy reactant and polycarboxylic acid or derivative reactant; or derived from di- or higher ester of a polycarboxylic acid as sole reactant {9}
440.~.~.~.~.~ Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen); or wherein solid polymer is derived from a -N=C=X reactant and also a polycarboxylic acid or derivative and a polyhydroxy reactant

DEFINITION

Classification: 525/440

Mixed with -N=C=X reactant or polymer derived therefrom (X is chalcogen); or wherein solid polymer is derived from a -N=C=X reactant and also a polycarboxylic acid or derivative and a polyhydroxy reactant:

(under subclass 437) Subject matter wherein the solid polymer derived from polycarboxylic acid or derivative reactant and polyhydroxy reactant or from a di- or a higher ester or a polycarboxylic acid as sole reactant is mixed with-N=C=X or blocked N=C=X reactant or polymer derived therefrom; or wherein the solid polymer is derived from a polycarboxylic acid or derivative reactant, a polyhydroxy reactant, and a -N=C=X or blocked N=C=X reactant (X is chalcogen).

(1) Note. This subclass takes solid polyol, polycarboxylic acid derived from polyester mixed with isocyanate reactant as well as solid polymer derived from polyol, polycarboxylic acid and diisocyanate mixed with a chemical treating agent.

SEE OR SEARCH THIS CLASS, SUBCLASS:

395, for a discussion of the term "blocked".