Lining of pipes
CA 2434008 A1 · Owner: Delaforce, Stephen Robert · Inventors: Delaforce, Stephen Robert; Burd, John Ferris; Ashworth, Roger Philip
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of lining a main pipe and one or more service pipes extending therefrom is disclosed. The method comprises lining a main pipe with a liner of plastics material, inserting a liner of plastics material into a service pipe from an end of the service pipe remote form the main pipe and penetrating the wall of the main pipe liner to bring the main pipe into fluid communication with the service pipe. The wall of the main pipe liner is preferably penetrated by providing a pig or robot inside the lined main pipe locating the position at which a service pipe is joined to the main pipe and using the pig or robot to cut, drill or pierce through the wall of the main pipe liner. A …
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 January 10, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 10, 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.