Electrical plug
CA 2173798 C · Owner: Chou, Jonie · Inventors: Chou, Jonie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrical plug which includes an, insulative bottom shell which holds a metal sleeve at the center, a first annular metal cushion spaced around the metal sleeve, and second annular metal cushion spaced around the first annular metal cushion; an insulative upper shell covered on the bottom shell and having a circular opening; and electrical cable having two electrical wires respectively connected to the metal sleeve and the first annular metal cushion and a, grounding wire connected to the second annular metal cushion; and a rotary cap revolvably mounted within the circular opening of the upper shell which holds two metal contact blades, which are maintained in contact with the metal …
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 April 10, 1996 and granted September 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2018.
- 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.