US PATENT SUBCLASS 73 / 23.31
.~ Gas of combustion

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

23.2  DF  GAS ANALYSIS {15}
23.31.~ Gas of combustion {1}
23.32  DF  .~.~> Air-fuel ratio {1}

DEFINITION

Classification: 73/23.31

Gas of combustion:

(under subclass 23.2) Subject matter wherein the gas being tested is the product of a combustion process.

SEE OR SEARCH CLASS

340, Communications: Electrical,

632+, for a humanly perceptible indication of a predetermined condition of a gas of combustion.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

94+, for a detector, per se, of combustible gas.