US PATENT SUBCLASS 507 / 112
.~.~.~ Carbohydrate is cellulose or derivative thereof

Current as of: June, 1999
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507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

100  DF  EARTH BORING {4}
103  DF  .~ Contains organic component {14}
110  DF  .~.~ Organic component is carbohydrate or derivative thereof (e.g., sugar or gum, such as galactomannan, xanthan, etc.) or carboxylic acid ester of an alcohol which has five or more hydroxy groups bonded directly to carbons {4}
112.~.~.~ Carbohydrate is cellulose or derivative thereof {2}
113  DF  .~.~.~.~> Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.)
114  DF  .~.~.~.~> Hydroxyalkylcellulose (e.g., HEC, etc.)

DEFINITION

Classification: 507/112

Carbohydrate is cellulose or derivative thereof:

(under subclass 110) Composition wherein said carbohydrate is cellulose or a derivative thereof.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104, for fibrous cellulose in which the fibrous character has been retained from an original plant or animal source (e.g., paper, cotton, etc.).