US PATENT SUBCLASS 174 / 24
.~ Conduits, cables and conductors

Current as of: June, 1999
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174 /   HD   ELECTRICITY: CONDUCTORS AND INSULATORS

8  DF  WITH FLUIDS OR VACUUM {12}
24.~ Conduits, cables and conductors {3}
25 R  DF  .~.~> Impregnated insulation type {4}
27  DF  .~.~> Parallel or twisted conductors
28  DF  .~.~> Coaxial or concentric type {1}

DEFINITION

Classification: 174/24

(under subclass 8) Structures pertaining to the makeup of electric cables or conductors, insulated or uninsulated, and of the conduits therefor, including the arrangement of the wires or cables therein.

(1) Note. Where the sole fluid is air under atmospheric conditions, this subclass takes those patents dealing with arrangements to provide air spaces for a particular purpose. Plural conductors or cables spaced within a conduit or sheath with or without means for maintaining them in spaced relation are in this class, subclass 68.1 and indented subclasses.

(2) Note. This subclass and the indented subclasses take such structure having means for handling or introducing fluid materials or permitting their flow in fluid condition, and also such structure where the material claimed is fluid under conditions of use. All other patents on such structure which claim a material which is solid in condition of use (even though applied during manufacture in fluid condition) or which claim material in broad terms not limited to being fluid in condition of use, are in this class, subclass 68.1 and indented subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2, 3 for lightning protection means employing fluids.

6, 7, for earth grounds employing fluids. 47, for conduits having both electrical conductor channels and separate fluid channels.

101.5, for buoyant conduits, cables and conductors.

126.1+, for mere bare hollow conductors.

SEE OR SEARCH CLASS

191, Electricity: Transmission to Vehicles,

26, for third rail or trolley wire conduits having draining means.