US PATENT SUBCLASS 507 / 239
.~.~ Organic component contains nitrogen 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

200  DF  WELL TREATING {4}
203  DF  .~ Contains organic component {17}
239.~.~ Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding {6}
240  DF  .~.~.~> Organic component is quaternary ammonium salt
241  DF  .~.~.~> Organic component contains plural carboxylic acid, ester, or salt groups attached directly or indirectly to nitrogen by nonionic bonding
242  DF  .~.~.~> Nitrogen is part of a hetero ring {1}
244  DF  .~.~.~> Oxygen is attached directly or indirectly to carbon by nonionic bonding {2}
247  DF  .~.~.~> Sulfur is attached directly or indirectly to carbon by nonionic bonding
248  DF  .~.~.~> Organic component consists only of carbon, hydrogen, and nitrogen {2}

DEFINITION

Classification: 507/239

Organic component contains nitrogen attached directly or indirectly to carbon by nonionic bonding:

(under subclass 203) Compositions wherein nitrogen is attached to carbon directly or indirectly by nonionic bonding.

(1) Note. A composition with nitrogen as part of a mere counterion to an ionic compound is not a basis for including such a composition in this subclass. For example, an ammonium alkylsulfonate is included in subclass 259; however, if the ammonium cation is a quaternary alkylammonium, then placement is in subclass 240. An additional cross-reference in subclass 259 in accordance with the (8) Note under subclass 200 is highly recommended.