US PATENT SUBCLASS 507 / 227
.~.~.~.~ Sulfur is attached directly or indirectly to the ethylenic monomer 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}
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}
227.~.~.~.~ Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding {1}
228  DF  .~.~.~.~.~> Monomer contains benzene ring and sulfonate group

DEFINITION

Classification: 507/227

Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding:

(under subclass 221) Compositions wherein the polymer contains sulfur attached to an ethylenic moiety directly or indirectly by nonionic bonding.

(1) Note. A composition with sulfur 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 poly(vinylphosphonium) sulfate is included in subclass 221.