US PATENT SUBCLASS 525 / 537-- .~.~.~ Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g., polyarylene sulfide, etc.

US PATENT SUBCLASS 525 / 537
.~.~.~ Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g., polyarylene sulfide, etc.

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}
535	DF	.~.~ Solid polymer derived from sulfur-containing reactant {2}
537		.~.~.~ Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g., polyarylene sulfide, etc.

DEFINITION

Classification: 525/537

Solid polymer derived from alkali metal sulfide and halogenated aromatic reactant, e.g, polyarylene sulfide, etc.:

(under subclass 535) Subject matter wherein the solid polymer is derived from the reaction of an alkali metal sulfide-containing reactant and a halogenated aromatic reactant.

(1) Note. This subclass includes polymers such as polyphenylene sulfide. In the event that the patent is silent with regard to how the polymer is prepared it will be assumed that it is prepared from an alkali metal sulfide and a halogenated aromatic reactant and will be placed herein.