US PATENT SUBCLASS 507 / 231
.~.~.~.~ Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, 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}
219  DF  .~.~ Organic component is solid synthetic resin {2}
221  DF  .~.~.~ Resin is polymer derived from ethylenic monomers only (e.g., maleic, itaconic, etc.) {6}
231.~.~.~.~ Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.)


DEFINITION

Classification: 507/231

Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.):

(under subclass 221) Compositions wherein the polymer contains a carbocyclic ring which is attached to an ethylenic moiety directly or indirectly by nonionic bonding.

(1) Note. A composition with a carbocyclic ring as part of a mere counterion to an ethylenic moiety is not a basis for including such a composition in this subclass. For example, a tetraphenylammonium poly(vinyl phosphonate) is classified in subclass 221. An additional cross-reference in subclass 240 in accordance with the (8) Note under subclass 200 is highly recommended.