US PATENT SUBCLASS 122 / 364
.~.~.~ Tube closures

Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

235.11  DF  WATER TUBE {52}
*  DD  .~ Headers {1}
360  DF  .~.~ Closures and couplings {4}
364.~.~.~ Tube closures

DEFINITION

Classification: 122/364

(under subclass 360) Subject matter comprising headers and tubes provided with valves for closing the flow of water through the tubes or headers.

SEE OR SEARCH THIS CLASS, SUBCLASS:

507, for automatically closed valves classified in Class 122.

SEE OR SEARCH CLASS

138, Pipes and Tubular Conduits,

89+, for pipe closures.

220, Receptacles, 200+, for closures of general application.