US PATENT SUBCLASS 138 / 89
WITH CLOSURES AND PLUGS

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

89WITH CLOSURES AND PLUGS {7}
*  DD  .~> Inflation stem type {3}
90  DF  .~> Test plugs
91  DF  .~> Double end
92  DF  .~> Lateral opening
93  DF  .~> Inflatable
94  DF  .~> Laterally insertable {1}
95  DF  .~> Return bend type

DEFINITION

Classification: 138/89

(under the class definition) Subject matter relating to pipes or pipe fittings having closures or plugs, or closures and plugs limited by structure to use with pipes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

98+, for patches.

SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

286+, for bath, closet, and sink closures.

89, Ordnance, 31, for plugs or other devices for closing the gun-muzzle or other opening in the barrel of a gun.

122, Liquid Heaters and Vaporizers,

360+, for closures and couplings for water tube boilers.

137, Fluid Handling,

247.11+, for liquid seals including access openings and closures therefor, especially subclasses 247.47 and 247.51.

156, Adhesive Bonding and Miscellaneous Chemical Manufacture,

294, and 423 for processes and apparatus for inserting a core within a tube in combination with a laminating step.

166, Wells,

75.11+, for well head closures having some fluid handling feature and subclasses 192+ and the subclasses there noted for plugs inserted into a prepositioned well conduit.

174, Electricity: Conductors, and Insulators,

20, 22 and 23, for fluid stops associated with electrical conduits, cables, end structures or joints. 202, Distillation: Apparatus,

242+, for closures for distillation apparatus.

215, Bottles and Jars,

37+, for closures for bottles and jars.

217, Wooden Receptacles,

56+, subclasses 76+ and subclasses 98+ for closures for wooden receptacles.

220, Receptacles,

200+, for closures and plugs having a more general use.

285, Pipe Joints or Couplings,

126.1, for couplings having an access opening with closure means.

405, Hydraulic and Earth Engineering,

42, for an end closure for irrigation or drainage conduit.