Battery with electrochemical tester
CA 2119577 C · Owner: Wu, Louis L. · Inventors: Chi, Ignacio; Lin, Lifun; Treger, Jack
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an electrochemical cell (50) and a related state of charge indicator (60) comprising an electrochemically generated display (40). The state of charge indicator (60) comprises two electrical contacts (12, 14) and an electrochemically generated display (40) connected therebetween. The display (40) comprises an electrochemical cell (12 14, 20) that, may be permanently connected to a main cell (50) in a parallel configuration via the contacts (12, 14). The condition of the main cell (50) may thus be continuously displayed on the indicator (60).
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 11, 1992 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 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.
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.