SWAN, Circuit Judge.
This is a patent for a "consumer of flue impurities," and discloses both a process and an apparatus for getting rid of greasy soot from kitchen range ovens by passing the fumes from the oven through a flue having a filter mat of steel wool; the object being to prevent the fouling of kitchen walls and hangings. The specifications recite that the attempt to remove the soot and grease from heated gases by asbestos fiber and other filters has been...
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