Sandwich insulation for increased corona resistance
CA 2130161 C · Owner: Jones, G. Paul · Inventors: Draper, Robert Edward; Stutt, Michael; Rehder, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a sandwich type insulation for electrical machinery comprising a laminate of a polymeric material such as a polyimide bonded to mica paper. The resultant insulation may be used as a tape or wrapper.
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 August 15, 1994 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2016.
- 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.