US PATENT SUBCLASS 528 / 933
.~ Resin removal or conversion

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

931  DF  PHYSICAL TREATMENT OF NATURAL RUBBER OR NATURAL RUBBER CONTAINING MATERIAL OR CHEMICAL TREATMENT OF NON-RUBBER PORTION THEREOF, E.G., EXTRACTION OF RUBBER FROM MILK WEED, ETC. {3}
933.~ Resin removal or conversion

DEFINITION

Classification: 528/933

Resin removal or conversion:

(under subclass 931) Subject matter relating to treatments to remove or convert the resin portion of natural rubber as obtained from the plant source.