Captive tear tab with protective means for container opening
CA 2067529 A1 · Owner: Krause, Arthur A. · Inventors: Krause, Arthur A.; Krause, Arthur A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tear tab closure for forming an opening in a container end wall, in which the tear tab remains external of the container and captive thereon when it is opened, and further wherein the tear tab is constructed so that there are no recesses for collecting foreign matter. The tear tab is separable from the container end wall along a frangible score line to form the opening and a pull ring is, attached to the tear tab to pull it back from the end wall to form the opening, with the tear tab remaining captive on the container. A vertical fold is formed in the container end wall adjacent the score line to provide a shield to protect the user from the severed edge of the tear tab after it is …
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 April 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2014.
- 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.