US PATENT SUBCLASS 507 / 253
.~.~.~ Organic component contains ether linkage (i.e., C-O-C)

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}
252  DF  .~.~ Organic component contains sulfur attached directly or indirectly to carbon by nonionic bonding {2}
253.~.~.~ Organic component contains ether linkage (i.e., C-O-C) {2}
254  DF  .~.~.~.~> The sulfur is part of a sulfate group
255  DF  .~.~.~.~> The sulfur is part of a sulfonate group

DEFINITION

Classification: 507/253

Organic component contains ether linkage (i.e., C-O-C):

(under subclass 252) Compositions wherein the organic component contains two carbons directly bonded to the same oxygen (i.e., C-O-C).

(1) Note. An ether is an organic compound having the general structure C-O-C wherein the carbon bonded to the oxygen atom cannot be double bonded to oxygen, sulfur, selenium, or tellurium or triple bonded to nitrogen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

257, for thioethers containing no oxygen ether linkage.