Electrical insulating material comprising an insulating layer in the form of an organic polymer
CA 1329519 C · Owner: Hjortsberg, Arne · Inventors: Hjortsberg, Arne; Johansson, Lennart; Karlsson, Thommy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tape-formed or sheet-formed insulating material comprising an insulating section in t he form of a homogeneous film of an organic polymer or in the form of a felt of a paper of fibres of an organic polymer. The insulating layer is coated at least on one side with a protective layer which protects the insulating layer against degradation caused by corona and which comprises an organic polymer containing at least 10 per cent by volume of a powdered filler in the form of chromium oxide, iron oxide or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 104-108 ohm m. The thickness of the protective layer and the total thickness of the protective …
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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
- Granted May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
- 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.