US PATENT SUBCLASS 122 / 21
CHEMICAL


Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

21CHEMICAL


DEFINITION

Classification: 122/21

(under the class definition) Boilers wholly or partly heated by chemical action other than that of the combustion of fuel. This subclass includes that type of liquid heater and steam generator known in the art as "alkali" generators for steam.

SEE OR SEARCH CLASS

126, Stoves and Furnaces,

263.01+, for chemical heaters of general utility.