Electric lamp, base for use therewith and method of assembling same
CA 1293290 C · Owner: Chakrabarti, Kirti B. · Inventors: English, George J.; Chakrabarti, Kirti B.; Hough, Harold L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric lamp including a reflector at least, one conductive ferrule located within a surface of the reflector and a lead-in conductor electrically connected to the ferrule and extending within the reflector. The lamp includes a base having an insulative (e.g. ceramic) cap located substantially about the ferrule, barrier means (e.g. ceramic fiber) located within the cap to define an open chamber substantially about the ferrule, an electrical conductor (e.g. wire) extending within the cap and electrically connected (e.g. silver soldered) to the ferrule and sealing means (e.g. high temperature cement located within the cap to provide a seal therefore. The barrier means serves to separate …
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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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 2008.
- 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.