Asymmetric arc chamber for a discharge lamp
CA 1301237 C · Owner: Cap, Daniel Michael · Inventors: Karikas, John Janos; Gilliard, Richard Phillip; Cap, Daniel Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal halide discharge lamp includes an asymmetric arc tube design which allows a more uniform heating of the arc tube top and bottom wall regions so, that metal halide condensate is distributed over the interior surface of the arc tube in the arc region between the lamp electrodes. This provides a higher density of metal halide constituents in the arc tube so that a generally more efficacious and lower color temperature lamp can be achieved. The presence of halide condensate distributed on the arc tube surface also promotes better lumen maintenance by retarding tungsten transport to the arc tube wall.
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
- Granted May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.