US PATENT SUBCLASS 525 / 458
.~.~.~.~.~ Contains polyhydroxy reactant; or additional polymer derived from -N=C=X and 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}
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}
457  DF  .~.~.~.~ Mixed with -N=C=X reactant or polymer therefrom {1}
458.~.~.~.~.~ Contains polyhydroxy reactant; or additional polymer derived from -N=C=X and polyhydroxy reactant

DEFINITION

Classification: 525/458

Contains polyhydroxy reactant; or additional polymer derived from -N=C=X and polyhydroxy reactant:

(under subclass 457) Subject matter which contains a solid polymer derived from a -N=C=X reactant and polyhydroxy reactant and additional reactants at least one of which is a -N=C=X or blocked -N=C=X or blocked -N=C=X reactant and at least one of which is polyhydroxy reactant or a polymer thereof.

(1) Note. This subclass includes blends of solid polyurethanes, a solid polyurethane with a nonsolid polyurethane and a solid polyurethane with a polyisocyanate and a polyhydroxy reactant.