US PATENT SUBCLASS 507 / 228
.~.~.~.~.~ Monomer contains benzene ring and sulfonate group

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  DF  .~.~.~.~ Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding {1}
228.~.~.~.~.~ Monomer contains benzene ring and sulfonate group

DEFINITION

Classification: 507/228

Monomer contains benzene ring and sulfonate group:

(under subclass 227) Compositions wherein the monomer contains a benzene ring and a sulfonate group.