Carbon material for battery and battery containing the carbon material
CA 2694838 A1 · Owner: Sudoh, Akinori · Inventors: Sotowa, Chiaki; Sudoh, Akinori; Nishimura, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to graphite powder and to a battery using it as a negative electrode material the powder , having a specific surface area of not more than 3 m2/g an, aspect ratio of not more than 6, and a tapping bulk density of not less than 0.8 g/cm3; or a tapping bulk density of not less than 0.8 g/cm3 and an oxidation initiation temperature of not less than 600°C; or a specific surface area of not more than 3 m2/g and a tapping bulk density of not less than 0.8 g/cm3 a , specific electrical resistance of the powder not more than 0.06 .OMEGA.cm in the specified condition. The battery obtained thus has a large discharge capacity, good cycle property and high charge …
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 October 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2021.
- 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.