Lamp socket assembly
CA 2122844 C · Owner: Cheng, You-Jen · Inventors: Cheng, Tzu-Ling; Cheng, You-Jen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lamp socket assembly includes a socket shell having a positive contact metal plate and a negative contact metal plate, a socket cap fastened to said socket shell to hold down an electrical wire causing said positive and negative contact metal plates to make respective contact with either conductor of said electrical wire wherein the positive, contact metal plate has an arched contact portion projecting into a center opening on a top end of the socket shell to make an electrical contact with the tip contact of the lamp bulb being fastened to the socket shell, a triangular contact portion pierces into the insulator of the electrical wire to make an electrical contact, and a rectangular …
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 May 4, 1994 and granted December 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 4, 2016.
- 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.