US PATENT SUBCLASS 536 / 43
.~.~.~.~ Ethers

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}
30  DF  .~.~.~ Cellulose derivatives {3}
43.~.~.~.~ Ethers {1}
44  DF  .~.~.~.~.~> Mixed ethers

DEFINITION

Classification: 536/43

(under subclass 30) Compounds which have the general formula ROR', wherein RO is the cellulose residue moiety and R' is an organic radical.

(1) Note. Nitrogen containing cellulose ethers are made by substituting and organic radical for the hydrogen atom of a portion of the hydroxyl groups of cellulose.

(2) Note. The attached organic radical R' is referred to as the etherifying radical.