US PATENT SUBCLASS 507 / 114
.~.~.~.~ Hydroxyalkylcellulose (e.g., HEC, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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  DF  .~.~.~ Carbohydrate is cellulose or derivative thereof {2}
114.~.~.~.~ Hydroxyalkylcellulose (e.g., HEC, etc.)

DEFINITION

Classification: 507/114

Hydroxyalkylcellulose (e.g., HEC, etc.):

(under subclass 112) Composition wherein said cellulose derivative is a hydroxyalkyl ether cellulose (e.g., hydroxyethylcellulose (HEC), etc.).