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Expired Canadian patentCanada

Two-slot plane coiling method for rotating electric machine

CA 2294109 C · Owner: Milet, Yves · Inventors: Milet, Yves; Deltour, Robert; Huart, Philippe

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention concerns a method for producing a coil for a rotating electric machine magnetic circuit wherein the conductors are placed in the magnetic circuit slots along two slot planes the method consisting in producing the two conductor planes (11 12) successively and independently, each conductor plane (11 12) comprising at least a layer (13, 15; 14 16) of conductors.

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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 June 19, 1998 and granted April 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 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.
FiledJune 19, 1998
GrantedApril 12, 2011
Term endedJune 19, 2018
Patent numberCA 2294109 C
Classification (IPC)H02K15/08 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedJune 19, 1998Patent grantedApril 12, 2011Term endedJune 19, 2018

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.