Composite body
CA 1184037 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Rouwendal, Jan W.; Driessen, Antonius J.G.C.; Geertsema, Eise B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 9968 17 28.8.1981, ABSTRACT:, Composite body. Composite body a gas discharge lamp having a, sodium pressure from 300-600 torr in particular having, an envelope of densely sintered aluminium oxide or of other sodium vapour-resistant materials and a feed-through member of tantalum, niobium or other metals equivalent thereto, the bonding material consisting of a finely dispersed polycrystalline product having a composition in mole % between the following limits:, Al2O3 5-70 at least one oxide chosen from, Sc2O3 and Ti2Ox wherein 2 < x < 4 2-70, and at least one oxide chosen from: Y2O3 Gd2O3, Tb2O3, DY2O3, Ho2O3, Er2O3 Eu2O3, Pr2O3, Ce2O3, Sm2O3, Tm2O3, Yb2O3 Lu2O3, La2O3 and Nd2O3 7-80.
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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
- 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.