US PATENT SUBCLASS 521 / 42
.~.~.~.~ Treating with organic nitrogen-containing material

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

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {3}
40  DF  .~ PROCESS OF TREATING SCRAP OR WASTE PRODUCT CONTAINING SOLID ORGANIC POLYMER TO RECOVER A SOLID POLYMER THEREFROM {5}
40.5  DF  .~.~ Process of treating scrap or waste product containing at least one polymer derived from ethylenic unsaturated monomers only {3}
41  DF  .~.~.~ Treating rubber (or rubberlike materials) or polymer derived from a monomer having at least two ethylenic unsaturated moieties {6}
42.~.~.~.~ Treating with organic nitrogen-containing material

DEFINITION

Classification: 521/42

Treating with organic nitrogen-containing material:

(under subclass 41) Subject matter wherein the process requires an organic nitrogen-containing material.

(1) Note. This subclass includes the use of an organic nitrogen-containing material as a solvent, catalyst, or other function.