Non-aqueous battery
CA 2201344 C · Owner: Asahi Kasei Emd Corporation · Inventors: Yamashita, Masaya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-aqueous cell comprising a rolled electrode assembly including a positive plate with an active layer, a negative plate with an active layer and a , separator between the active layers of the positive and the negative plates; and a case that contains the electrode assembly and a non-aqueous electrolyte. In this cell, a metallic portion disposed in association with the positive plate and having an equipotential to the positive plate is equipped on at least one of the sides thereof with a portion having no active layer and thus , forms a positive plate equipotential exposed metallic portion (.alpha.) extending in a lontitudinal direction for a length at least one turn and this , …
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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 September 27, 1995 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2017.
- 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.