US PATENT SUBCLASS 525 / 452
.~.~ Solid polymer derived from -N=C=X reactant (X is chalcogen)

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.~.~ 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}

DEFINITION

Classification: 525/452

Solid polymer derived from -N=C=X reactant (X is chalcogen):

(under subclass 50) Subject matter involving processes of mixing a solid polymer derived from a -N=C=X of blocked -N=C=X reactant with an additional solid polymer, with specified polymer-forming ingredients, or with a specified intermediate condensation product, chemical treating agent, or with an ethylenic agent; processes or products resulting from the above mixing processes (X is chalcogen).

SEE OR SEARCH THIS CLASS, SUBCLASS:

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