Battery separators
CA 2123674 A1 · Owner: Lee, Joseph Yuen · Inventors: Lee, Joseph Yuen; Degen, Peter John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a battery separator comprising a nonwoven electrolyte reservoir layer bonded to a nonwoven support layer. The support layer comprises fibers having a mean diameter greater than about 15 microns, and preferably has been calendared to a thickness of less than about 10 mils, with a thickness variability of no more than about 10%. The electrolyte reservoir layer comprises fibers having a mean diameter of about 10 microns or less, and a thickness of less than about 15 mils and, preferably is melt-blown directly onto the support layer. The nonwoven fibers that comprise the electrolyte reservoir layer and the support layer are selected from the group consisting of …
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 May 16, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2016.
- 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.