Pipe coupling
CA 2392636 C · Owner: Youssefifar, Fatollah · Inventors: Youssefifar, Fatollah
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Known couplings for corrugated conduits have a housing moulded of a rigid plastics material with two spring catches on opposite sides to engage between corrugations on the conduit. In the present invention a continuous layer of a softer elastomeric material is moulded on top of the rigid material extending on both the outside and inside of the housing. On the inside the softer material extends on a tapering surface to seal with the end of the conduit. On the outside the layer of softer material forms both a flange on an annular ledge to seal with a cooperating coupling and manual gripping regions.
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 8, 2002 and granted July 5, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 8, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2024.
- 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.