US PATENT SUBCLASS 137 / 238
.~ Cleaning or steam sterilizing

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

237  DF  WITH CLEANER, LUBRICATION ADDED TO FLUID OR LIQUID SEALING AT VALVE INTERFACE {2}
238.~ Cleaning or steam sterilizing {4}
239  DF  .~.~> Reverse fluid flow
240  DF  .~.~> With separate material addition
241  DF  .~.~> Steam sterilizing
242  DF  .~.~> Mechanical cleaning {2}

DEFINITION

Classification: 137/238

(under subclass 237) Systems containing a means other than those causing or controlling the normal or unmodified flow of the fluent material of the system for removing germs or other undesirable internal or extraneous material from the system itself or parts thereof, as distinguished from treating the material being handled to remove undesirable material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

171+, for traps for separating or venting either gas or liquid from a pressure system containing both materials.

312+, for leakage or drip collecting in fluid handling devices.

387, for washing machine cycle control involving liquid level response or maintenance.

544+, for screens, filters, sediment, traps, etc., for removing undesired particles from the material being handled.

SEE OR SEARCH CLASS 8, Bleaching and Dyeing; Fluid Treatment and Chemical

Modification of Textiles and Fibers,

137+, for cleaning and laundering processes for textiles and fibers. 147+ for manipulative fluid treatment processes for textiles and fibers.

15, Brushing, Scrubbing, and General Cleaning, appropriate subclasses for fluid blast or suction cleaning and mechanical cleaning with or without the addition of liquid.

62, Refrigeration,

303, for a refrigerator combined with cleaning means.

68, Textiles: Fluid Treating Apparatus, appropriate subclasses for fabric cleaning by liquid contact.

134, Cleaning and Liquid Contact With Solids, appropriate subclasses for cleaning by liquid contact.