Secondary battery and manufacturing method therefor
CA 2092222 C · Owner: Fujimoto, Masahisa · Inventors: Ueno, Koji; Nishio, Koji; Yoshinaga, Noriyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secondary battery is comprised a positive electrode, an electrolyte and a negative electrode which intercalates lithium reversibly. The negative electrode uses a carbon compound having a crystal structure of graphite, and the carbon compound having carbon (C) being partially replaced by both boron (B) and nitrogen (N) and having a formula BC3N or the carbon compound having carbon (C) being partially replaced by boron (B) and having a formula BC3. In the battery, the positive electrode may be a metal chalcogen or metal oxide, such as, LiNiO2 LiMn2O3, LiFeO2, LiCoO2 and MnO2. The, electrolyte may be a nonaqueous electrolyte or a solid electrolyte. The non-aqueous electrolyte uses an organic …
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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 March 23, 1993 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2015.
- 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.