Restrained sleeve pipe coupling
CA 2432266 C · Owner: Ebaa Iron, Inc. · Inventors: Lundstrom, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A restrained sleeve coupling assembly for interconnecting pipe sections includes a generally cylindrical sleeve body with opposed gasket engaging surfaces adjacent opposite ends of the body for receiving fluid sealing gaskets forcibly engaged with the body and opposed end rings which are sleeved over the respective pipe sections to be joined. The end rings include flanges for engagement with elongated tension bolt assemblies to secure the sleeve body the gaskets and the end rings in assembly with each other. The end rings also include circumferentially spaced bosses and polygonal shaped gripper members disposed in recesses in the bosses and forcibly engageable with the outer surfaces 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 June 12, 2003 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.