US PATENT SUBCLASS 250 / 339.13
.~.~.~.~.~ With gaseous sample

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16}
338.1  DF  .~ Infrared responsive {12}
339.01  DF  .~.~ With selection of plural discrete wavelengths or bands {6}
339.06  DF  .~.~.~ With radiation source {5}
339.12  DF  .~.~.~.~ Using sample absorption for chemical composition analysis {1}
339.13.~.~.~.~.~ With gaseous sample

DEFINITION

Classification: 250/339.13

With gaseous sample:

(under subclass 339.12) Subject matter wherein a sample is in a gaseous state.

SEE OR SEARCH THIS CLASS, SUBCLASS:

343, for infrared responsive systems with fluid confining means between the source and detector.