Screw cap
CA 2000229 A1 · Owner: Weiss, Jurgen · Inventors: Preuss, Hans-Joachim; Dubs, Hans-Dieter; Weiss, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screw cap for a container that has a thread in particular, bottles, jars, and the like is proposed, this being, characterized by a threaded ring that incorporates at least one projection that engages in the thread on the container and which forms the thread of the screw cap. It is preferred that the threaded ring be configured as a safety ring i.e. that it have, a lower ring section that incorporates barbs that extend from a perpendicular wall area. When the container is first opened the, barbs engage under suitable projections on the container and burst the lower ring section off. The cap of the screw cap need incorporate no threads of any kind because of the projections 15 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 October 5, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2011.
- 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.