US PATENT SUBCLASS 507 / 131
.~.~.~ Oxygen is attached directly or indirectly to carbon by nonionic bonding

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.~.~.~ Oxygen is attached directly or indirectly to carbon by nonionic bonding {2}
132  DF  .~.~.~.~> Organic component contains a nitrogen attached directly to oxygen by nonionic bonding (e.g., nitroaromatic, amineoxide, etc.)
133  DF  .~.~.~.~> Organic component contains an ether linkage

DEFINITION

Classification: 507/131

Oxygen is attached directly or indirectly to carbon by nonionic bonding:

(under subclass 129) Composition wherein the organic component contains nitrogen and oxygen, both of which are attached to carbon directly or indirectly by nonionic bonding (e.g., alkanolamines, amino acids, EDTA, etc.).

(1) Note. Nitrogen and/or oxygen as part of a mere counterion to an ionic compound does not bring the composition into this subclass (for example, an alkylmagnesium nitrate is classified in subclass 103, above).

(2) Note. Solid inorganic oxides treated with a nitrogen containing organic compound are not covalently linked unless there is disclosure to the contrary and are classified in subclass 129.