US PATENT SUBCLASS 508 / 181
.~ PTFE (polytetrafluoroethylene)

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
181.~ PTFE (polytetrafluoroethylene) {2}
182  DF  .~.~> With compound having ether group
183  DF  .~.~> With silicon compound, or organic phosphorus or sulfur compound

DEFINITION

Classification: 508/181

PTFE (polytetrafluoroethylene):

(under subclass 110) Compositions which contain an addition homopolymer of tetrafluoroethylene, CF2=CF2.

(1) Note. The addition polymers provided for herein have the general formula (-CF2[end subscrpt]-CF2-)n.