US PATENT SUBCLASS 507 / 261
.~.~ Organic component contains ether linkage (e.g., PEG ether, etc.)

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

200  DF  WELL TREATING {4}
203  DF  .~ Contains organic component {17}
261.~.~ Organic component contains ether linkage (e.g., PEG ether, etc.) {1}
262  DF  .~.~.~> Organic component contains a carbocyclic group

DEFINITION

Classification: 507/261

Organic component contains ether linkage (e.g., PEG ether, etc.):

(under subclass 203) Compositions wherein the organic component contains two carbons bonded directly to the same oxygen (e.g., cyclic ethers such as pyrans, furans, crown ethers, etc.; linear ethers; and polyethers such as polyalkoxylated alkylphenols, polyalkylene glycols, etc.).