Tracking resistant electrical insulating material suitable for high voltage applications
CA 2290317 A1 · Owner: Heydrich, Marcus P.W. · Inventors: Heydrich, Marcus P.W.; Jackson, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tracking resistant electrical insulating material or article suitable for high voltage, applications comprising a silane-grafted polyolefin or olefin-silane copolymer; and a heat-, shrinkable article prepared therefrom. Said material is preferably prepared by a process, comprising: reacting a first polyolefin with a silane in the presence of a free-radical initiator to, form a silane-grafted resin or copolymerising a polyolefin with silane; preparing a mixture of the, first silane-modified resin with optional one or more non silane-modified polyolefins, and a silanol, condensation catalyst; forming the insulating material or article by melt extruding or moulding, said mixture; and …
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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 November 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2021.
- 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.