Battery capacity indicator
CA 2180475 C · Owner: Pete, Inc. · Inventors: Lyster, Thomas; Cameron, David Bradley; Powers, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is a battery, monitor and battery capacity indicator that uses a sense cell (22) in addition to the main battery (10) to determine main battery remaining ca-, pacity and depletion condition. A parameter of the sense cell is related to the main battery capacity so that, the main battery will have a minimum capacity remaining when the, sense cell parameter reaches a particular value or crosses a particular, threshold. In a preferred embodiment, the sense cell (22) is a battery which is identical and of the same, manufacturing lot as the battery cell or cells (20) in the main battery, pack (10). A current is drawn from the sense cell that is larger than the current being drawn …
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 January 10, 1995 and granted December 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 2017.
- 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.