US PATENT SUBCLASS 432 / 19
.~ Controlling flame position or work atmosphere

Current as of: June, 1999
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432 /   HD   HEATING

1  DF  PROCESSES OF HEATING OR HEATER OPERATION {14}
19.~ Controlling flame position or work atmosphere {7}
20  DF  .~.~> Providing flame or high luminosity
21  DF  .~.~> Including recycling work atmosphere
22  DF  .~.~> Establishing strata, layer or curtain
23  DF  .~.~> Establishing or maintaining composition of atmosphere bathing work
24  DF  .~.~> Modulating or stabilizing pressure or temperature
25  DF  .~.~> Providing pulsed or periodically reversed atmosphere
26  DF  .~.~> By mode of admission of treating or protecting fluid

DEFINITION

Classification: 432/19

(under subclass 1) Process including a step of forming, maintaining or circulating atmosphere in a heating chamber or about work material.

SEE OR SEARCH CLASS

264, Plastic and Nonmetallic Article Shaping or Treating: Processes, for sintering or vitrifying of shaped bodies, particularly,

646+, or 674+ with controlling of gas composition of the heating chamber, subclasses 653+ with plural heating steps, subclasses 664+ or 667+ with specified gas pressure in the heating chamber, or subclasses 677+ with controlling or directing heated gas or exhaust within a heating chamber.

431, Combustion,

8, for a combustion process involving flame shaping or distributing components in a combustion zone.