US PATENT SUBCLASS 507 / 220
.~.~.~ Resin is polymer derived from phenolic and aldehydic monomers

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}
220.~.~.~ Resin is polymer derived from phenolic and aldehydic monomers

DEFINITION

Classification: 507/220

Resin is polymer derived from phenolic and aldehydic monomers:

(under subclass 219) Compositions wherein the resin is a polymer derived from phenolic and aldehydic monomers.