Device for indicating the charge status of a battery
CA 1262934 C · Owner: Folmer, Lambert J.H. · Inventors: Van Den Akker, Jouw; Hishiki, Teruo; Ijntema, Johannes
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PHN 11 762, ABSTRACT:, Device for indicating the charge status of a battery. For determining the charge status of a battery (4) when it is discharged by a load (XL) and/or when it is charged by a power-supply circuit (1) a value representing the nominal charging time and discharging time respectively and stored in first (10) and second adjusting means (11) respectively is applied to computing means (12). On the basis of clock pulses applied to the computing means (12) by the clock means (13) the computing means calculate the charge status of the battery by expressing the elapsed discharging or charging time as a faction of the adjusted discharging time and charging time respectively which, …
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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
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.