Tamper-evident cap for containers
CA 2049765 A1 · Owner: Cap Snap Co. · Inventors: Wallman, Irwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A push on cap for engaging a container neck is formed with inturned thickened flanges on its inner surface which cooperate with matching grooves in the container neck to retain the cap in place when the skirt is intact. A circumferential groove is formed in the skirt intermediate the inturned thickened flanges joined with a second groove extending to the bottom edge of the skirt. A tab projecting beyond the skirt is gripped and pulled causing the skirt to tear upward and then circumferentially thereby removing the lower thickened flange and permitting the top of the cap to be removed and reclosed. A rigid circumferential flange on the exterior of the skirt is spaced above the level of the …
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 August 23, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2013.
- 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.