Secondary battery
CA 2106066 C · Owner: Yamashita, Masataka · Inventors: Minato, Yasufumi; Inoue, Katsuhiko; Takizawa, Yumiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secondary battery is disclosed, comprising an organic electrolytic solution contained in a casing and, disposed therein, a positive electrode comprised of a lithium-containing composite metal oxide as a cathode active material and a negative electrode comprised of a carbonaceous material as an anode active material, wherein the positive and negative electrodes are arranged through a separator disposed therebetween and wherein the organic electrolytic solution has a water content of from 5 ppm to 450 ppm. The secondary battery has excellent current efficiency cycle charac-, teristics, storage characteristics and safety and therefore, can be advantageously used in various electric devices …
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 September 14, 1992 and granted August 12, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2014.
- 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.