Electric heater and method of making
CA 1095221 A · Owner: General Motors Corporation · Inventors: Mann, Gamdur S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A sheathed electric heater for use as an engine glow plug or the like is formed by providing a closed end metal sheath, installing a centered electric heating element that approaches the sheath closed end, adding a small amount of sinterable metal powder covering the end of the heating element at the closed end of the sheath, filling the remaining volume around the element with granular electrical insulating material swaging the assembly to reduce its diameter extend its length, and compact the insulation and sintering the metal powder by, passing electric current therethrough to provide a low resistance electrical connection between the heating coil and the …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 10, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.