US PATENT SUBCLASS 285 / 378
.~ Diverse metal seat

Current as of: June, 1999
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285 /   HD   PIPE JOINTS OR COUPLINGS

335  DF  PACKED {20}
378.~ Diverse metal seat

DEFINITION

Classification: 285/378

(under subclass 335) Subject matter including a bushing or washer of a material diverse from the material of the head and upon which the gasket seats, generally to prevent rusting of the seat with resultant loss of sealing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

329, for a particular interface of diverse metal.