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:
Dec. 02, 1986
Filed:
Sep. 26, 1984
Frederick G Grise, Osterville, MA (US);
Flexwatt Corporation, Canton, MA (US);
Abstract
An electrical heating device comprising a substrate having an upper insulating surface, a semi-conductor pattern carried on the insulating surface, and a pair of metallic conductors mounted in face-to-face engagement with said semi-conductor pattern. The semi-conductor pattern includes a pair of spaced connector portions and at least one heating portion extending between and electrically connected to each of said connector portions, the connector portions have a electrical conductivity greater than that of said heating portion, and each of the metallic conductors is in face-to-face engagement with a respective one of said connector portions and has an area that is less than that of said respective one of said connector portions and an area:perimeter ratio greater than D/20 wherein D is the major dimension of the respective conductor portion.