US PATENT SUBCLASS 507 / 224
.~.~.~.~ Polymer derived from acrylic acid monomer or derivative

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}
224.~.~.~.~ Polymer derived from acrylic acid monomer or derivative {1}
225  DF  .~.~.~.~.~> Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.) {1}

DEFINITION

Classification: 507/224

Polymer derived from acrylic acid monomer or derivative:

(under subclass 221) Compositions containing a polymer derived from at least one acrylic acid monomer or derivative (e.g., from CH2=C(R)-X, wherein X is carbonyl, etc., and R is H or alkyl, etc.).

(1) Note. Included in this subclass are methacrylate polymers, etc.