Class 432/174 - Including noncommunicating combustion products flue

Subclass of Class 432 - Heating
Definition: Apparatus including a flue by which combustion products
No. of patents: 4
Last issue date: 11/25/2003

Number	Title	Issue Date
6652267	Burner for the partial oxidation of liquid fuels which contain carbon The burner has at least two fuel-carrying tubes which are arranged in parallel, the distance between adjacent fuel-carrying tubes being 5 to 30 cm. Each fuel-carrying tube is surrounded by a steam-carrying tube, which at its orifice end has a supply line ...	11/25/2003
4421480	Ceiling beam construction for heating furnace An improved ceiling beam construction for a heating furnace in which ceiling beams having closed cross sections are adopted for utilizing the interior of the beams as ducts for passing gases through them so as to reduce spaces required for installing sepa...	12/20/1983
4238238	Calcining kettle having means for returning stack exhaust gas to calcining mixture A calcining apparatus comprising a kettle, a heating chamber for heating the outside of the kettle, a stack for exhausting gas from the heating chamber, a duct connected at one end to the stack and having the other end extending for a limited distance int...	12/09/1980
4176157	Calcining calcium sulphate dihydrate A method and apparatus for calcining calcium sulphate dihydrate in a calcination vessel in which the dihydrate is heated in the vessel to calcination temperature not only by heat applied to the exterior of the vessel but also by hot gas, especially hot ga...	11/27/1979

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