US PATENT SUBCLASS 507 / 225-- .~.~.~.~.~ Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.)

US PATENT SUBCLASS 507 / 225
.~.~.~.~.~ Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, 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}
224	DF	.~.~.~.~ Polymer derived from acrylic acid monomer or derivative {1}
225		.~.~.~.~.~ Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.) {1}
226	DF	.~.~.~.~.~.~> Sulfur is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamidoalkane sulfonates, etc.)

DEFINITION

Classification: 507/225

Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.):

(under subclass 224) Compositions wherein nitrogen is attached to the acrylic moiety through direct or indirect nonionic bonding.

(1) Note. A composition with nitrogen as part of a mere counterion to an ethylenic moiety is not a basis for including such a composition in this subclass. For example, ammonium polyacrylates are included in subclass 224.