US PATENT SUBCLASS 536 / 48
.~.~.~.~ 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}
18.7  DF  .~.~ Nitrogen containing {13}
45  DF  .~.~.~ Starch derivatives {4}
48.~.~.~.~ Esters {1}
49  DF  .~.~.~.~.~> Ether-esters or mixed esters

DEFINITION

Classification: 536/48

(under subclass 45) Compounds which result from the reaction of a hydroxyl group of a nitrogen containing starch derivative 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 moiety entering into the formation is a halogen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for nitrogen containing starch esters that are cross-linked.