Sealed, alkaline-zinc storage battery
CA 2274285 C · Owner: Nogami, Mitsuzou · Inventors: Fujitani, Shin; Tokuda, Mitsunori; Yano, Mutsumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealed alkaline-zinc storage battery is disclosed which includes a battery can a hollow positive electrode disposed within the battery can for electrical contact therewith and containing nickel hydroxide as a positive active material a negative electrode disposed inwardly of the positive electrode and containing zinc as a negative active material a separator disposed between the positive and negative electrodes a negative current collector disposed for insertion into the negative electrode and an alkaline electrolyte filled in the battery can for impregnation into the positive electrode negative electrode and separator. The positive electrode negative electrode, separator, negative …
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 June 9, 1999 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2021.
- 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.