Porous metal sheet, battery electrode plate composed of porous metal sheet and battery having electrode plate
CA 2311441 A1 · Owner: Katayama Special Industries, Ltd. · Inventors: Sugikawa, Hirofumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A porous metal sheet, for use in a battery electrode substrate, composed of a two-layer structure consisting of a first and second foamed metal layers or a structure having three or more layers consisting of the first and second foamed metal layer, a mesh metal layer and the like sandwiched between said first and second layer. The number of cells of the first foamed metal layer is smaller than that of the second foamed metal layer. The electrode plate is spirally wound with the second foamed metal layer located at a peripheral side and with the first foamed metal layer located at an inner peripheral side.
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 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2022.
- 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.