Rechargeable lithium battery having improved reversible capacity
CA 2218709 C · Owner: Electrovaya Inc. · Inventors: Dasgupta, Sankar; Jacobs, James K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved rechargeable lithium battery is described comprising a transition metal compound as cathode active material and carbonaceous particles as anode active material, having prior intercalated lithium ions in the carbonaceous particles in the anode of the assembled lithium battery thereby reducing the , weight of the cathode active material required. The rechargeable lithium battery has increased energy density per unit weight and per unit volume.
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 February 12, 1997 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2019.
- 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.