Hydrogen occlusion alloys for electrical cells
CA 2209128 A1 · Owner: Sawa, Haruo · Inventors: Sawa, Haruo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a hydrogen occlusion alloy suitable for a negative electrode material of a closed type nickel hydride secondary cell in which the increase of gas pressure in the cell during overcharging is prevented and self discharge in the open circuit state would be effectively inhibited being, represented by the following compositional formula: ANiaCobMncXd wherein A is a misch metal containing not more than 60% by weight of Ce, X is at least one element selected from the group consisting of Al, Cu, Mo and Zn and a, b, c, and d are numbers satisfying the following relations: 0.4 <b<2.0, 0~c<0.2, 0.1<d<2.0, and 4.55<a+b+c+d<4.80.
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 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2019.
- 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.