Electric lamp with high torque threaded base
CA 2106636 A1 · Owner: Gte Products Corporation · Inventors: Meade, Steven Lee; Gallant, Joseph Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric lamp with high torque threaded base having lamp envelope, threaded base, and light source is disclosed. The electric lamp with high torque threaded base includes portions of the threaded base positioned in concavities formed on the tubular end of the lamp envelope. No melt junction, and no glues are needed in coupling the envelope and base. The coupling is strong enough to resist decoupling by hand.
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 September 21, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2015.
- 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.