US PATENT SUBCLASS 137 / 1
PROCESSES

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

1PROCESSES {5}
2  DF  .~> With control of flow by a condition or characteristic of a fluid {6}
12.5  DF  .~> Carbonated beverage handling processes
13  DF  .~> Affecting flow by the addition of material or energy
14  DF  .~> Involving pressure control
15  DF  .~> Cleaning, repairing or assembling

DEFINITION

Classification: 137/1

(under the class definition) Processes.

(1) Note. All patents containing method claims drawn to the method of operation of any of the systems or parts thereof involved in the class are included in this and the indented subclasses, but methods of making parts of the system are not included. They will be found in the subclass providing for the system or part.

(2) Note. This subclass includes, for example, methods of operation of speed regulators for prime movers, valves, fluid motors; methods of developing fluid pressures by series parallel combinations of pumps, tanks or pipes; methods for affecting fluid flow by using pipe sections of varying diameter or joined at critical angles, or by slugging.

SEE OR SEARCH CLASS

166, Wells,

244.1+, for process of flowing or treating a well; and particularly subclasses 373+ for a method of operating a valve, closure, or changeable restrictor in a well wherein some significant manipulative step regarding the well is recited.

210, Liquid Purification or Separation, 606, 631, 632, 639, 663+, 696+, 702+, and 749+ for a process comprising the step of adding a chemical to a liquid with treatment of the liquid.

222, Dispensing,

1, for processes of dispensing.

399, Electrophotography,

237+, for liquid developer applied to a latent image within an electrophotos:graphic device.

414, Material or Article Handling,

800+, for a process of material or article handling.