Compact arc discharge lamp with thermal switch
CA 2085020 C · Owner: Bazin, Simone P. · Inventors: Bazin, Simone P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arc discharge lamp having an arc tube mounted within a lamp envelope includes a thermal switch for controlling application of electrical energy to a starting electrode. The thermal switch is mounted between the arc tube and the lamp base with its longitudinal axis generally parallel to the central axis of the lamp envelope. The thermal switch is spaced from the central axis of the lamp envelope by a support rod and extends into an annular space between the lamp stem and the wall of the lamp envelope. As a result the maximum temperature of the thermal switch during lamp operation does not exceed about 400ÀC.
Read the whole patent
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
- Filed December 10, 1992 and granted March 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2014.
- 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.