US PATENT SUBCLASS 277 / 539
.~.~.~.~ Graphite

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

345  DF  SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
500  DF  .~ Circumferential contact seal for other than piston {13}
510  DF  .~.~ Contained or compressed by gland member in packing box {10}
534  DF  .~.~.~ Particular seal material or construction {4}
539.~.~.~.~ Graphite

DEFINITION

Classification: 277/539

Graphite:

(under subclass 534) Particular material or construction wherein the specific substance forming the seal is graphite.