Cylindrical electrochemical cell with cup seal for separator
CA 2337031 A1 · Owner: Battery Technologies Inc. · Inventors: Daniel-Ivad, Elfriede; Book, R. James; Daniel-Ivad, Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cylindrical electrochemical cell includes a cathode (14) an anode (18), a , cylindrical separator (20) coaxial with the cell, for electrically separating the cathode and anode, and a cup seal (35 36, 37, 38, 39, 40) at an end of , the separator for electrically separating the anode and cathode and maintaining an ionic connection therebetween. The cup seal is comprised of one or more first layers of a micro-porous or a non-porous membrane or a , combination thereof, and one or more second layers of a porous sheet material and wherein the seal overlaps (34) at least a portion of the separator.
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 July 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- 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.