The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Apr. 04, 1996
Stuart J Olstad, Maple Grove, MN (US);
Kevin T Uznanski, Plymouth, MN (US);
Phoenix Solutions Co., Minneapolis, MN (US);
Abstract
An electrical foam heating element made by the process of forming a volume of reticulated silicon carbide foam material into a preferred shape, heating the material to a temperature of about 1000.degree. C. for a period of 24-30 hours, forming conductive edges over two respectively facing edge surfaces, applying an electrically-conductive felt material against the respective conductive faces, and clamping foam volume and foam between two electrically-conductive electrodes. In another embodiment, a region of nickel foam material is provided between the respective electrodes and the silicon carbide interior, and intermediate felt layers are provided between the nickel foam and the silicon carbide foam, and between the nickel foam and the electrodes. The layered felt material is of three-layer construction: inner and outer layers of electrically-conductive felt separated by an interior metal foil layer.