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Expired Canadian patentCanada

Transformer core clamping structure

CA 1298886 C · Owner: Cooper Power Systems, Inc. · Inventors: Hay, Noah D.

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 transformer core and coil assembly comprising a core including first and second generally vertical, spaced-apart portions first and, second coils respectively wound around the first and second portions of the core, and a clamping structure including a generally horizontally upper member disposed above the core and the coils, a generally horizontal lower member disposed below the core and the coils, and a generally vertical end plate assembly which is disposed adjacent one of the coils which extends between and is connected to the upper and lower members and which includes a vertically extending end plate having an upper end extending above the upper member, and the end plate assembly also …

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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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 28, 1989
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298886 C
Classification (IPC)H01F27/02 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJuly 28, 1989Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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