US PATENT SUBCLASS 536 / 61
.~.~.~.~.~.~ Subsequent treatment process

Current as of: June, 1999
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536 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1.11  DF  .~ Carbohydrates or derivatives {15}
56  DF  .~.~ Cellulose or derivative {4}
58  DF  .~.~.~ Esters {3}
59  DF  .~.~.~.~ Sulfur containing acid {1}
60  DF  .~.~.~.~.~ Xanthate or viscose {1}
61.~.~.~.~.~.~ Subsequent treatment process

DEFINITION

Classification: 536/61

(under subclass 60) Compounds in which cellulose xanthate or viscose is purified, recovered, separated, altered physically; or treated chemically wherein the primary intent is merely to modify a property of the product.

(1) Note. Merely forming viscose from the xanthate is not considered a subsequent treatment.

SEE OR SEARCH THIS CLASS, SUBCLASS:

57, for regenerated cellulose.