Tamper-evident closure device
CA 2136691 A1 · Owner: Galen (Chemicals) Limited · Inventors: Dudzik, Mark Henryk Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamper-evident closure device (11) for a container (10) has a tear tab (17) which can be at least partially detached by tearing to leave an opening through which the contents of the container (10) can be removed. A roller (18) integral with one edge (17b) of the tab (17) has an operating member (19) for manually rotating the roller (18) back across the tab (17) from the one edge (17b) such that during such rotation the tab (17) is progressively torn away starting at the one edge (17b).
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 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 25, 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.