Tamper-evident closure
CA 1292444 C · Owner: Anchor Hocking Corporation · Inventors: Hayes, Thomas H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamper-evident closure cap is described which is easily applied to a container and which thereafter may not be removed without the separation of a tamper indicating band. Locking tabs on the tamper indicating band are hinged to the band with and over-center hinge means for facilitating the effective tab position on a sealed container.
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
- Granted November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.