Method of forming and reforming a plastic composite
CA 2095733 A1 · Owner: Sleezer, Philip · Inventors: Sleezer, Philip; Blackmore, Richard D.; Schmidt, Alan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lining (10) and method for in situ rehabilitation of a pipe is disclosed. The lining comprises a tubular shaped resin impregnated composite (20) having a conductive layer surrounding an inflatable bladder (30). The method comprises the steps of positioning the lining (10) within a pipe section, inflating the bladder (30) until the lining is in contiguous contact with the interior of the pipe and inducing an electric current through the conductive layer (24) to resistively heat the lining and cure the impregnated resin. A method of reforming a composite part such as a pipe, lining, is also enclosed. The reforming method comprises heating a composite having a thermosetting resin which …
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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 11, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2014.
- 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.