Nonaqueous secondary battery and negative electrode material therefor
CA 2178675 C · Owner: Aono, Yasuhisa · Inventors: Horiba, Tatsuo; Kodama, Hideyo; Inagaki, Masahisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A nonaqueous secondary battery achieves a long life-time and a high capacity density by increasing the discharging capacity and extending the life-time of the negative electrode. The battery has a positive electrode and a negative electrode reversibly absorbing and discharging an alkaline metal and a nonaqueous electrolyte. The negative electrode is made of an inter-metallic compound containing at least one element selected from the group consisting of 4B group elements, P and Sb. The inter-metallic compound has any one of CaF2 type, ZnS type and AlLiSi type crystal structures. The CaF2 type structure is either an inverse-fluorite structure or a fluorite structure having a lattice constant …
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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
- Filed June 10, 1996 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2018.
- 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.