Process for repairing or restoring in situ, a section of a pipe or chamber for receiving or containing pressurized fluid and device for carrying out said process
CA 2092690 C · Owner: Labiche, Jean-Pierre · Inventors: Labiche, Jean-Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process consists of the following steps: a) sealing, if need be, any defect in the section with the aid of a sealing material; b) fixing onto the pipe (2) the end of a flexible profile (3) made of longitudinal fibres coated in a thermoplastic matrix, the elastic limit of said fibres being greater than that of the pipe (2) or chamber material: c) rotating means (7) about pipe (2) axially displacing said means along the latter in order to supply said profile (9); d) tensionally winding the profile (9) in successive spirals around the pipe (2) at and near said section on either side of, the latter by heating in order to melt substantially the entire matrix mass, and then by cooling the …
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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 September 13, 1991 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2013.
- 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.