US PATENT SUBCLASS 536 / 84
.~.~.~ 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}
56  DF  .~.~ Cellulose or derivative {4}
84.~.~.~ Ethers {7}
85  DF  .~.~.~.~> Subsequent treatment process {4}
90  DF  .~.~.~.~> Mixed ethers {1}
92  DF  .~.~.~.~> Sulfur containing
93  DF  .~.~.~.~> Unsaturated {1}
95  DF  .~.~.~.~> Hydroxyalkyl containing {1}
97  DF  .~.~.~.~> Carboxyalkyl or salts thereof {1}
99  DF  .~.~.~.~> Alkyl or cycloalkyl {1}

DEFINITION

Classification: 536/84

(under subclass 56) Compounds having the general formula ROR', wherein RO- is the cellulose residue moiety and R' is an organic radical.

(1) Note. Cellulose ethers are made by substituting an 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.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, for nitrogen containing cellulose ethers.