End cap seal assembly for an electrochemical cell
CA 2325397 A1 · Owner: Duracell Inc. · Inventors: Hession, John A.; Gardner, William H.; Sargeant, Sean A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An end cap seal assembly (10) for an electrochemical cell such as an alkaline cell (8) comprises a convoluted end cap disk (40) which may also function as a cell terminal and an underlying insulating disk (20) also having a convoluted surface. The convoluted end cap disk (40) has a downwardly extending wall (45) with at least one aperture (48) therethrough which preferably faces the ambient environment. The insulating disk (20) has a downwardly extending wall (26) forming a rupturable membrane (23) which underlies and abuts the inside surface of the downwardly extending wall of the end cap. The rupturable membrane underlies and abuts the aperture (48) in the downwardly extending …
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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 March 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 22, 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.