US PATENT SUBCLASS 405 / 52
FLUID CONTROL, TREATMENT, OR CONTAINMENT

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

52FLUID CONTROL, TREATMENT, OR CONTAINMENT {7}
53  DF  .~> Fluid storage in earthen cavity {3}
60  DF  .~> Floatable matter containment {4}
73  DF  .~> Erosive scouring
74  DF  .~> Settling of suspended matter in a specific location (e.g., at a scoured pier)
75  DF  .~> Extracting power from moving fluid {2}
79  DF  .~> Wave generation or enhancement
80  DF  .~> Flow control {7}

DEFINITION

Classification: 405/52

FLUID CONTROL, TREATMENT, OR CONTAINMENT:

(under the class definition) Method or apparatus relating to (a) storing a fluid in an earth formation, (b) creating, regulating, or redirecting the flow of a moving body of liquid, (c) extracting energy from a moving body of liquid, (d) inhibiting the formation of an undesirable suspended material in a body of water, (e) redistributing suspended material in a body of water, or (f) containing the spread of an undesirable floatable material on a body of water.

(1) Note. Excluded from this subclass are liquid purification or separation process or apparatus.

SEE OR SEARCH CLASS

137, Fluid Handling, appropriate subclasses for devices for controlling water under pressure, particularly

236.1, for distribution systems involving geos:graphic features; and subclasses 247+ for liquid seal traps.

210, Liquid Purification or Separation, appropriate subclasses for the separation from a liquid of any character of material, and for miscellaneous processes and apparatus for treatment of a liquid mixture for purification not specifically provided for in this class (405).

261, Gas and Liquid Contact Apparatus, appropriate subclasses for apparatus specifically adapted to produce an intimate contact between gases and liquids to exchange properties or mutually modify conditions.