US PATENT SUBCLASS 528 / 931
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.

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

931PHYSICAL 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}
932  DF  .~> Protein removal or conversion
933  DF  .~> Resin removal or conversion
934  DF  .~> Latex {3}

DEFINITION

Classification: 528/931

PHYSICAL TREATMENT OF NATURAL RUBBER OR NATURAL RUBBER CONTAINING MATERIAL OR CHEMICAL TREATMENT OF NONRUBBER PORTION THEREOF, E.G., EXTRACTION OR RUBBER FROM MILK WEED, ETC.:

Subject matter relating to the recovery and physical processing of natural rubber.