Fluid control valve
CA 2511681 C · Owner: Dahm, Peter Kasper · Inventors: Dahm, Peter Kasper
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a non-return valve (3) particularly a urinal valve, comprising a component (4) of highly flexible resilient material having a selfsupporting trough-shaped section (5) at one and a flat strip (6) at the other and a cooperating component providing surface against which the flat strip (6) can seal, preferably the cooperating component will be a mirror image of an identical construction.
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 19, 2003 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 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.