Polymer insulator
CA 2229363 A1 · Owner: Koshino, Yukihiro · Inventors: Fujii, Shuji; Koshino, Yukihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disclosed polymer insulator has an FRP rod an, insulation overcoat member made of rubber which is arranged on an outer surface of the FRP rod, and securing metal fittings which are secured and fixed to both ends of the FRP rod. In the polymer insulator mentioned above a reinforcing, portion for achieving a long life thereof which is arranged on a line side portion of the insulation overcoat member to which a high stress of electric field is applied (first aspect). Moreover, in the polymer insulator mentioned above the line side portion of the insulation overcoat member is made of a low temperature vulcanizing rubber (second aspect) or a high elastic rubber (third aspect).
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 February 12, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 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.