US PATENT SUBCLASS 536 / 20
.~.~.~ Chitin or derivative

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}
20.~.~.~ Chitin or derivative

DEFINITION

Classification: 536/20

(under subclass 18.7) Compounds which upon acid hydrolysis yield acetylglucosamine and which are polysaccharides having the following repeating unit (below) and derivatives thereof.

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(1) Note. Chitin is a horny substance that forms part of the hard outer shell of insects and crustaceans and is structurally similar to cellulose.