Alkaline cell with improved cathode
CA 2350945 A1 · Owner: Kelsey, G. Stephen · Inventors: Kaplan, Alex; Cintra, George; Chalilpoyil, Purush
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An alkaline cell (10) is disclosed having a cathode (12) comprising manganese dioxide wherein the cathode (12) is a semisolid during discharge of the cell. The cell (10) may have an anode (50) comprising zinc and an electrolyte comprising potassium hydroxide. The semisolid cathode (12) comprising manganese dioxide may be in the form of a putty or paste. The semisolid cathode (12) reduces cathode polarization effects and results in increased manganese dioxide utilization (Amp-hr/g) particularly at high current drain, between about 0.5 and 2 Amp.
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 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.