US PATENT SUBCLASS 507 / 133
.~.~.~.~ Organic component contains an ether linkage

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}
129  DF  .~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding {2}
131  DF  .~.~.~ Oxygen is attached directly or indirectly to carbon by nonionic bonding {2}
133.~.~.~.~ Organic component contains an ether linkage

DEFINITION

Classification: 507/133

Organic component contains an ether linkage:

(under subclass 131) Composition wherein the organic component contains an ether linkage; i.e., two carbons directly bonded to the same oxygen atom (e.g., polyoxyalkyleneamines, etc.).