US PATENT SUBCLASS 405 / 36
DRAINAGE OR IRRIGATION

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

36DRAINAGE OR IRRIGATION {7}
37  DF  .~> Control means responsive to sensed condition
38  DF  .~> Including subsurface moisture barrier
39  DF  .~> Having regulation of flow through channel {1}
42  DF  .~> End cap
43  DF  .~> Porous or apertured pipe, flume, or tileway {6}
50  DF  .~> Porous waterway, e.g., sand drain, etc.
51  DF  .~> Branched flow

DEFINITION

Classification: 405/36

DRAINAGE OR IRRIGATION:

(under the class definition) Method or apparatus including a step or means for either (a) collecting and removing surplus water from the soil, (b) applying water to the soil for agricultural purposes, or (c) the installation of apparatus for collecting and removing water from the soil or applying water to the soil.

(1) Note. For original placement in this and indented subclasses, a claim to a channel or ditch must include structure specific to irrigation or drainage, e.g., a drainage inlet or irrigation outlet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

118, for open channels with no irrigation outlet or drainage inlet.

119+, for open channels, above-ground fluid carriers (flumes) with no irrigation features (apertures, etc.).

SEE OR SEARCH CLASS

47, Plant Husbandry, 1.01, for installed irrigation systems having means to supply fertilizer to the irrigating water.

166, Wells, appropriate subclasses for methods and apparatus relating to wells for recovering fluids from the earth.

239, Fluid Sprinkling, Spraying, and Diffusing, appropriate subclasses for pressurized irrigating systems with above-ground terminal outlets (e.g., nozzles).

404, Road Structure, Process, or Apparatus,

2+, for a drain or gutter combined with walkway or road structure.