US PATENT SUBCLASS 110 / 181
DOOR CASINGS AND ARCHES

Current as of: June, 1999
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110 /   HD   FURNACES

181DOOR CASINGS AND ARCHES {1}
182  DF  .~> Feeding air

DEFINITION

Classification: 110/181

(under the class definition) Subject matter relating to the construction of casings and arches for furnace doors.

SEE OR SEARCH THIS CLASS, SUBCLASS:

180, for casings containing conduits.

331+, for furnace arch construction.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

85, 86+, 245+, and 639+ for a curvilinear building construction of more general application.