An electrodeless bulb with means for receiving an external starting electrode
CA 2327684 A1 · Owner: Walter, Gregory · Inventors: Cekic, Miodrag; Walter, Gregory; Lezcano, Pedro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Electrodeless lamp includes an envelope (6) containing a fill and a substance for facilitating the starting of the lamp. An outer tube (18) is secured to an outside portion of the envelope (6) in proximity to the given region and an inner tube (32) is disposed within the outer tube (18) such that a fluid passageway (36) is defined between the inner and outer tubes. A hollow retractable electrode (10) is provided within the inner tube (32) the , electrode (10) having a first position in which its tip portion is in proximity to the given region of the envelope when the lamp is being started and a second position in which the tip portion is away from the envelope after the lamp is …
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 July 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 2020.
- 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.