Manufacturing method of lithium complex oxide comprising cobalt or nickel
CA 2212824 C · Owner: Murata Manufacturing Co. Ltd. · Inventors: Sakabe, Yukio; Hattori, Koji; Yamashita, Yasuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a manufacturing method of a lithium complex oxide comprising the, steps of 1) atomizing and pyrolyzing an aqueous or alcohol solution of compounds containing metallic salts constituting a lithium cobalt complex oxide or a lithium nickel complex oxide and, 2) annealing said lithium cobalt complex oxide or said lithium nickel complex oxide to increase the average particle diameter thereof to between about 1 and 5 micrometers and adjust the specific surface area thereof to between 2 and 10m2/g. The lithium complex oxide provided by this method is homogeneous and enables a long cycle life to withstand repeated charging and discharging and a high level of storage stability …
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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 August 12, 1997 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 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.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.