Single piece closure device made of pvc
CA 2474160 A1 · Owner: Storzum, Uwe · Inventors: Rossato, Klaus; Breitscheidel, Boris; Storzum, Uwe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to single-piece closure devices comprising at least , polyvinylchloride and at least one softening agent especially at least one , substituted or unsubstituted cyclohexanedicarboxylic acid or a derivative thereof. The invention also relates to methods for producing one such closure device, in addition to the use of the inventive closure device for closing containers, especially bottles or wine bottles.
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 January 29, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 29, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 29, 2025.
- 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.