Lithium battery
CA 1136699 A · Owner: Sanyo Electric Co. Ltd. · Inventors: Ikeda, Hironosuke; Narukawa, Satoshi; Nakaido, Shigehiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a lithium battery having a negative electrode formed by lithium as active material and a positive electrode formed by manganese dioxide, carbon fluoride or the like as active material, the discharge capacity of the negative electrode is smaller than the discharge capacity of the positive electrode, whereby a drop in the battery voltage at the final discharge stage is steepened thereby to prevent a device using such lithium battery as power supply from operating in an unstable manner so as to, improve the reliability of such device.
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
- Granted November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.