Method of repairing electric pole made of concrete and electric pole
CA 2097111 C · Owner: Tonen Corporation · Inventors: Tanaka, Yoshinori; Saito, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A base reinforcement fiber sheet of carbon fibers in, which the carbon fibers are arranged uni-directionally via an adhesive layer on a support sheet, is wound on the surface of a portion of a concrete electric pole to be repaired. Then, a reinforcement fiber sheet of insulating fibers, in which the insulating fibers are arranged uni-directionally via an adhesive layer on a support sheet is wound as the outermost layer to fully cover the carbon fibers. Either before or after the winding of the carbon fibers and insulating fibers, the fibers are impregnated with a thermosetting resin, which is then cured to obtain a fiber reinforced composite material. In this way electric, poles can be …
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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 May 27, 1993 and granted February 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2015.
- 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.