US PATENT SUBCLASS 236 / 33
.~.~ Expanding solid

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

20 R  DF  CLOSED FLUID HEATERS {8}
*  DD  .~ Thermostatic {2}
33.~.~ Expanding solid

DEFINITION

Classification: 236/33

(under subclass 20) Devices controlling the heating means directly by a thermostat of the expanding-solid type responsive to the temperature of the fluid heated. The thermostat may be the walls of the container.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5, 19, 43, 59+, 66, 87, 96, and 101+, for the type of thermostat used and devices operated thereby.