US PATENT SUBCLASS 122 / 21
CHEMICAL
Current as of:
June, 1999
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122 /
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LIQUID HEATERS AND VAPORIZERS
21
CHEMICAL
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.
