US PATENT SUBCLASS 536 / 58
.~.~.~ Esters

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.~.~.~ Esters {3}
59  DF  .~.~.~.~> Sulfur containing acid {1}
62  DF  .~.~.~.~> Phosphorus containing acid
63  DF  .~.~.~.~> Carboxylic acid esters {5}

DEFINITION

Classification: 536/58

(under subclass 56) Compounds which result from the reaction of a hydroxyl group of cellulose with an acid.

(1) Note. The esterifying acid may be organic or inorganic.

(2) Note. This subclass does not provide for compounds formed when the sole acid function entering into the formation is a halogen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

32, for nitrogen containing cellulose esters.