U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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Class 431 - Combustion

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358 Subclasses


Subclasses list

Definition

This is the residual class for processes of combustion or combustion starting, and for apparatus peculiarly adapted to burn or ignite materials.

Notes

(1) Note. A fuel discharge nozzle is a subcombination of basic subject matter of this class if it is specialized for use in combustion solely (1) by discrete means transmitting flame between distinct fuel discharge areas; (2) by flashback preventing or controlling structure (3) by an incandescing component; (4) by means maintaining a reigniting flame; or (5) by flame enclosing, protecting or stabilizing structure. (2) Note. Patents issued prior to 1940 have not in all instances been classified by their claimed disclosure so the placement of these patents does not necessarily indicate lines of classification.

Lines with other classes and within this class

See References To Other Classes, below, for information about lines with other classes.
 
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