US PATENT SUBCLASS 432 / 23
.~.~ Establishing or maintaining composition of atmosphere bathing work


Current as of: June, 1999
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432 /   HD   HEATING

1  DF  PROCESSES OF HEATING OR HEATER OPERATION {14}
19  DF  .~ Controlling flame position or work atmosphere {7}
23.~.~ Establishing or maintaining composition of atmosphere bathing work


DEFINITION

Classification: 432/23

(under subclass 19) Process including a procedure by which a desired chemical makeup of the gaseous material surrounding the work is adjusted or established.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37, for apparatus under the class definition comprising automatic control means including an analyzer or composition sensor of work, work atmosphere or exhaust gas.