Electrochemical cells having means for indicating the degree of cell bulging
CA 2003759 A1 · Owner: Huhndorff, Harry R. · Inventors: Huhndorff, Harry R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrochemical cell has bulge responsive means and a wrap disposed about the cell container, wherein the wrap has two separable sections with one, section secured to the container and the other section in coactive engagement with the bulge responsive means. Upon effective bulging of the cell the one, section of the wrap is noticeably separated from the second section of the wrap.
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 November 23, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2011.
- 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.