Metal halide arc discharge lamp with free-standing arc tube
CA 2101740 A1 · Owner: Gte Products Corporation · Inventors: Williamson, Glen P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal halide arc discharge lamp includes a metal halide arc tube (12) located within a lamp envelope (14) a lamp stem (116), having first and second stem leads extending therethrough and a, frame member (20) mechanically connected between the first stem lead and a first end portion of the arc tube. A resistor can be connected between the second stem lead and a starting electrode lead for increased mechanical support. The resistor and the frame member provide the only mechanical support for the arc tube in the lamp envelope. The dome end of the arc tube is mechanically unsupported.
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 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 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.