Low pressure mercury discharge lamp for dc operation and method of operating the lamp
CA 1256154 A · Owner: Kabushiki Kaisha Toshiba · Inventors: Ito, Hidenori; Imamura, Hitoshi; Inoue, Akihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low pressure mercury discharge lamp for DC operation has a discharge tube sealing therein an ionizable medium containing a predetermined amount of mercury, a cathode, arranged at one end of the discharge tube, for emitting electrons, an anode arranged at the, other end of the discharge tube for collecting the, electrons, and an amalgam arranged at the anode side, of the discharge tube for adsorbing mercury in the, discharge tube when the lamp is turned off and for liberating mercury into the discharge tube when the lamp is turned on.
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 June 20, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 20, 2006.
- 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.