Electrical devices having polymeric insulating or semiconducting members
CA 2115642 C · Owner: Hendewerk, Monica Louise · Inventors: Hendewerk, Monica Louise; Mehta, Aspy Keki; Spenadel, Lawrence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electrically conductive and semiconductive device utilizing polymers having resistance to water treeing and good dielectric properties as well as other improved properties. The polymer comprises ethylene polymerized with at least one C3 to C20 alpha-olefin and optionally at least one C3 to C20 polyene. The polymer utilized has a density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.2 dg/min to about 100 dg/min a molecular weight distribution in, the range of about 1.5 to about 30 and a composition distribution breadth index greater than about 45 percent. For the polymer utilized, the tree rating is generally less than 40 the power factor is in …
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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 August 14, 1992 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.