Current leadthrough for ceramic discharge lamp
CA 1060525 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Driessen, Antonius J.G.C.; Vos, Hendricus E.M.C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The current leadthrough for the auxiliary electrode of a discharge lamp with ceramic lamp vessel is constructed as a cylindrical tube concentric with the leadthrough of the main electrode. This construction does not give rise to cracking of the lamp vessel. In addition to niobium and tantalum tungsten, molybdenum, rhenium and alloys thereof may be used for the manufacture of the current leadthrough. The cylindrical tube which serves as a current leadthrough can extend in the lamp vessel and serve itself as an auxiliary electrode. -14-
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 August 14, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 14, 1996.
- 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.