US PATENT SUBCLASS 110 / 331
ARCH OR ROOF STRUCTURE
Current as of:
June, 1999
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Terms of Use
110 /
HD
FURNACES
331
ARCH OR ROOF STRUCTURE
{2}
332
DF
.~
> Planar surface area {1}
335
DF
.~
> Concave surface area
DEFINITION
Classification: 110/331
ARCH OR ROOF STRUCTURE:
(under the class definition) Structure relating to combustion chamber ceiling construction provided to reflect and direct combustion gases and heat back to the burning fuel to thereby further promote the burning action.
