Composite metal/ceramic body and sealing compositions therefor
CA 1081761 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Oomen, Joris J. C.; Meden-Piesslinger, Gertraud A. A.; Klomp, Johannes T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Composite body consisting of two or more formed parts of densely sintered aluminium oxide and a metal, in particular an envelope for a mercury vapour discharge lamp with Metal halide filling. The parts are connected together with material which comprises at least two of the oxides SiO2 Al2O3 and B2O3 and at least one of the trivalent oxides La2O3 and Y2O3. This material is applied at a relatively low temperature and is resistant to the gas filling to approximately 1350°C.
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 July 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 1997.
- 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.