Liner strip for pipelines or tunnels
CA 2245062 C · Owner: Molyneux, Syd · Inventors: Molyneux, Syd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liner strip for lining an interior surface of a pipe including an extended plastic strip having T-shaped formations with reinforcing fibers integrally extruded in the liner strip for increasing the liner stiffness and tensile strength to resist forces imposed on the liner during installation.
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 August 12, 1998 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2020.
- 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.