Carbon-carbon composite particles, their preparation and use therefore as negative electrode for li-ion batteries
CA 2469407 C · Owner: Selman, Robert J. · Inventors: Selman, Robert J.; Zaghib, Karim; Guerfi, Abdelbast
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a process for preparing a composite of particles of a high crystallinity carbon and a low crystallinity carbon comprising the steps of: (i) dispersing a carbon powder having a high crystallinity and a polymeric substance in , a solvent and mixing until evaporation of 40 to 60% of the solvent; and (ii) heating the resulting mixture at a temperature ranging from 1200°C to 2500°C.
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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 December 6, 2002 and granted May 27, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2024.
- 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.