US PATENT SUBCLASS 422 / 120
FOR DEODORIZING OF, OR CHEMICAL PURIFICATION OF, OR GENERATION OF, LIFE-SUSTAINING ENVIRONMENTAL GAS

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

120FOR DEODORIZING OF, OR CHEMICAL PURIFICATION OF, OR GENERATION OF, LIFE-SUSTAINING ENVIRONMENTAL GAS {3}
121  DF  .~> With means exposing gas to electromagnetic wave energy or corpuscular radiation
122  DF  .~> Including solid, extended surface, fluid contact reaction means (e.g., Raschig rings, particulate or monolithic catalyst, etc.)
123  DF  .~> Including means adding material into environmental gas {2}

DEFINITION

Classification: 422/120

FOR DEODORIZING OF, OR CHEMICAL PURIFICATION OF, OR GENERATION OF, LIFE-SUSTAINING ENVIRONMENTAL GAS:

(under the class definition) Apparatus for (a) taking the odor out or masking the odor of, or (b) chemical purification of a life-sustaining environmental gas (for breathing) or the chemical generation of the same.

SEE OR SEARCH THIS CLASS, SUBCLASS:

168, for waste gas purifier which usually releases the gas to the atmosphere.

SEE OR SEARCH CLASS

128, Surgery,

202.26, for inhaling devices having means to regenerate the exhaled air so that it can be breathed again from the same device.