Pipe lining system
CA 2031263 A1 · Owner: Northcutt, Gerald G. · Inventors: Northcutt, Gerald G.; Northcutt, Gerald G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described an improved method for lining a pipe utilizing a pipe-received forwardly traveling machine comprising a forward seal and a following cylindrical platen defining a chamber therebetween, the method including the steps of forming the platen of a radiant energy transparent material and with an internal source of radiant energy introducing a, flowable liner-forming material into the chamber distributing, the flowable material in an annular space about and along the cylindrical platen between the platen and the pipe to define a constant thickness liner, and supporting the material in the space by the platen as the machine travels forward to form the liner in intimate contact …
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 November 30, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 2012.
- 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.