US PATENT SUBCLASS 110 / 180
.~ Cooling


Current as of: June, 1999
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110 /   HD   FURNACES

*  DD  DOORS AND CASINGS {1}
180.~ Cooling


DEFINITION

Classification: 110/180

(under the class definition) Subject matter relating to doors and casings that are kept cool by the circulation of steam or air through them.

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182, for doors and casings where the fluid after passing through them is fed to the fire.

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122, Liquid Heaters and Vaporizers,

497+, for boiler fronts.

202, Distillation: Apparatus, 243+, for fluid cooled still closures.

432, Heating,

237, for the subcombination of a material heating chamber comprising a door, door frame or chamber cover having protective cooling structure.