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Expired Canadian patentCanada

Staggered pole switched reluctance motor

CA 2234613 C · Owner: Tridelta Industries, Inc. · Inventors: Pengov, Wayne A.

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

A switched reluctance machine (10) includes a first element (12) having a plurality of uniform poles (18A, 18B, 18C ...) and a second element (12) , having a first pole (22A 22C) and a second pole (22B, 22D). The first pole has a wide face and the second pole has a narrow face. The first and second elements are disposed for movement relative to each other such that the wide and narrow poles are moveable in spaced relation to the plurality of uniform poles.

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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 October 15, 1996 and granted June 26, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2016.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2018.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 15, 1996
GrantedJune 26, 2001
Term endedOctober 15, 2016
Patent numberCA 2234613 C
Classification (IPC)H02K29/00 +2 more

Timeline

Timeline From CIPO dates

1997199920012003200520072009201120132015Application filedOct 15, 1996Patent grantedJune 26, 2001Term endedOct 15, 2016

Sources & verification

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