Electric lamp
CA 2020161 A1 · Owner: N.V. Philips' Gloeilampenfabrieken · Inventors: Willems, Gerardus Antonius Maria; Essers, Wilhelmus Gerardus; Buelens, Jozef Johannes Cornelis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 13.011 8-11-1989, ABSTRACT:, Electric lamp. The electric lamp has a lamp cap (6) with a contact member (9) at the base portion (8), a current supply conductor (4, 5) being passed to the exterior through said contact member. The current supply conductor (4 5) is welded, to said contact member (9) by a separately supplied solidified drop of essentially copper, nickel copper/nickel, chromium/nickel/iron or aluminium containing 1 - 10 % by weight of a metal addition.
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 June 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 29, 2012.
- 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.