Charger for a rechargeable nickel-zinc battery
CA 2325595 A1 · Owner: Phillips, Jeffrey · Inventors: Phillips, Jeffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A four-stage charging technique for nickel-zinc cells and batteries is provided, whereby a high cycle life is assured without dendrite, formation or harmful overcharge with minimal shape change of the zinc, electrode and with minimal oxygen recombination. In the first stage the, nickel-zinc cell or battery is charged with an average current less than C/5 for a period of less than five minutes or until the terminal voltage of a, cell reaches 1.75 volts to 1.79 volts. In the second stage a fast charge is, imposed, until the terminal voltage of a cell reaches between 1.88 volts and 1.92 volts. In the third stage, a moderate charge is imposed until the, terminal voltage of a cell reaches 1.90 …
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 November 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2022.
- 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.