US PATENT SUBCLASS 536 / 62
.~.~.~.~ Phosphorus containing acid

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}
62.~.~.~.~ Phosphorus containing acid

DEFINITION

Classification: 536/62

(under subclass 58) Compounds in which the acid moiety contains phosphorus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

34, for nitrogen containing cellulose esters in which the acid moiety contains a phosphorus.