Tamper evident caps and methods for producing such caps
CA 2072365 A1 · Owner: Mid American National Bank And Trust Co. · Inventors: La Rue, Daniel L.; Thompson, Mortimer Stafford; Schloss, Francis Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plastic tamper evident cap (10) includes a skirt (14) having threads (16) for engaging threads on a neck of a container for closing and opening the container, and an annular frangible band (20) connected to and depending from the skirt (14) wherein the band, (20) includes an outer wall (22) frangible connected to the skirt (14) by a line of weakness comprising fracturable bridges (18) and an inner wall (24) joined to the bottom of the outer wall by a curvilinear connecting portion (21) and extending therefrom inwardly and upwardly in a generally inverted ''J'' ''U'', ''V'', ''triangulated curl'' or ''trapezoidal'' cross-sectional shape wherein the inner wall (24) includes a free end (30) …
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 December 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2012.
- 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.