Bag produced from a thin pleated sheet provided with self-closing means
CA 2267261 A1 · Owner: Sweetheart Cup Company Inc. · Inventors: Buchberg, Akiva; Capy, Gilbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The bag is made from a pleated sheet comprising asymmetrical pleats and it comprises a closure consisting of two flaps (26 27) fixed to each other at their ends which are urged to apply against each other when the pleats of the bag are unfolded forcing the flaps (26 27) to adopt a concave shape which maintains one against the other without any other linking means.
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 July 18, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2019.
- 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.