Bi-stable interlock arrangement for molded case circuit breakers
CA 2046767 C · Owner: Yee, Edgar · Inventors: Bernier, Richard Emery; Yee, Edgar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bi-stable interlock arrangement allows two circuit interruption devices such as electric circuit breakers and electric disconnect switches to be interlocked such that only one such device can be turned ON at one time. The interlock is used with main and auxiliary power sources to ensure that only one source of electrical power is activated at one time.
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 July 11, 1991 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2013.
- 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.