Method of lining channels
CA 2274766 A1 · Owner: Komori, Mitsunori · Inventors: Banrai, Yuichi; Komori, Mitsunori; Hayashi, Mitsutoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of lining the inner surface of a conduit comprising placing on the , site a roll of hard or semi-hard plastic pipe deformed from the original shape, i.e. a generally circular pipe to a flat pipe drawing out the thermally softened pipe from the roll toward the opening of a conduit to be lined therewith, folding in two to a shape like the letter U in front of the opening, wherein the U-folded pipe is immediately set fixedly by cooling it forcedly from the outer surface of the pipe whose shape is kept retained put , into the conduit in this shape-retained state restored to its original shape , by expanding the pipe by heat and pressure from the inner side thereof. The lining is …
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 October 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 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.