US PATENT SUBCLASS 507 / 902
CONTROLLED RELEASE AGENT

Current as of: June, 1999
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507 /   HD   EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY

902CONTROLLED RELEASE AGENT

DEFINITION

Classification: 507/902

CONTROLLED RELEASE AGENT:

Subject matter wherein the composition contains a controlled release agent.

(1) Note. Said agent is a component in a form such as stick, capsule, or solid matrix, etc., for release in a delayed, sustained, or otherwise controlled manner.