Expired Canadian patentCanada
High capacity colloidal storage battery, a collodial electrolyte used in it, and the processes for producing them
CA 2053045 C · Owner: Zheng, Shuo · Inventors: Zheng, Shuo; Zheng, Anchen; Zheng, Hang
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provided a new type of high capacity storage battery, wherein the colloidal electrolyte is hard to hydration and has no cracking, and some improvements on the said high capacity colloidal sotrage battery are also disclosed.
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 October 10, 1991 and granted February 9, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 10, 1991
GrantedFebruary 9, 1999
Term endedOctober 10, 2011
Patent numberCA 2053045 C
Classification (IPC)H01M10/10
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.