Expired Canadian patentCanada
Light bulb filament dampening system
CA 2082764 C · Owner: Mccarthy, Raymond M. · Inventors: Kendall, Anthony E.; Talmon-Gros, Guenter E.; Mccarthy, Raymond M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filament dampening system far a filament in a miniature lamp includes a glass bridge formed around the lead wires and the filament dampening wire.
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 November 12, 1992 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 12, 1992
GrantedJune 4, 2002
Term endedNovember 12, 2012
Patent numberCA 2082764 C
Classification (IPC)H01K1/18 +1 more
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.