US PATENT SUBCLASS 405 / 43
.~ Porous or apertured pipe, flume, or tileway

Current as of: June, 1999
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405 /   HD   HYDRAULIC AND EARTH ENGINEERING

36  DF  DRAINAGE OR IRRIGATION {7}
43.~ Porous or apertured pipe, flume, or tileway {6}
44  DF  .~.~> Uniform discharge
45  DF  .~.~> Porous
46  DF  .~.~> Earthen bottom
47  DF  .~.~> Flow through joint
48  DF  .~.~> Open seam or shielded outlet
49  DF  .~.~> Corrugated

DEFINITION

Classification: 405/43

Porous or apertured pipe, flume, or tileway:

(under subclass 36) Method or apparatus wherein drainage or irrigation is effected by a structure having a water-conducting channel or passage formed therein and wherein the water is removed from or applied to the soil through (a) a port formed in the side wall of the channel or passage, (b) a foraminous side wall portion of the structure, or (c) the connection or joint between elements used to make up the water conducting structure.

(1) Note. A mainfold which feeds a plurality of feed pipes which in turn supply water to or drain it from the soil will not be found herein unless the feed pipes themselves are apertured or formed of a foraminous material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

154+, for subject matter relating to the positioning of a conduit below-ground.

SEE OR SEARCH CLASS

47, Plant Husbandry,

48.5, for a container or cartridge which contains water or the like and is adapted to be placed in the ground, whereby the liquid is applied or allowed to diffuse into the soil through some special feature, such as perforations in the container. 138, Pipes and Tubular Conduits, appropriate subclasses for pipes or tubes of general application.