US PATENT SUBCLASS 166 / 135
.~.~ Flow stopping type, e.g., plug

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


166 /   HD   WELLS

179  DF  PACKERS OR PLUGS {17}
118  DF  .~ With expanding anchor {12}
135.~.~ Flow stopping type, e.g., plug

DEFINITION

Classification: 166/135

(under subclass 118) Devices comprising a plug as defined in subclass 179.

SEE OR SEARCH THIS CLASS, SUBCLASS:

132, for plugs anchored beyond the conduit end.

192+, for plugs without separate expanding anchor means, these plugs being usually held in place by the frictional engagement of the sealing means.

SEE OR SEARCH CLASS

102, Ammunition and Explosives,

301+, for well torpedoes with plugging means; and subclass 333 for plugs used in blasting. 138, Pipes and Tubular Conduits,

89, for closures and plugs of general utility (including those assembled with a conduit before the conduit is inserted into the well).