Electrode substrate for battery and process for preparing the same
CA 2179347 C · Owner: Harada, Keizo · Inventors: Yamanaka, Shosaku; Harada, Keizo; Watanabe, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrode substrate, for a battery, as a support for an active material used in a collector for a battery, comprising a metallic porous structure possessing interconnecting pores with a porosity of not less than 90% and a number of pores per cm of not less than 10 and having an Fe/Ni two-layer structure wherein Fe constitutes the interior of a skeleton of a porous body constituting the porous structure with the surface portion of the skeleton coated with Ni. Preferably Fe constituting the interior of the, skeleton has a purity of not less than 98% by weight and the thickness of the nickel coating layer having an Fe content of not more than 10% by weight is 0.1 to 10 µm. The ratio of …
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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 18, 1996 and granted August 3, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 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.