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Expired Canadian patentCanada

Circuit breaker having insulation barrier

CA 1093128 A · Owner: Westinghouse Electric Corporation · Inventors: Maier, Alfred E.; Ricci, Louis N.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A circuit breaker having stationary and movable contacts operable between open and closed positions with the movable contact being biased in an open position. The movable contact is mounted to a contact holder which engages a toggle system which toggle is part of an operating mechanism which effects movement of the movable contact between open and closed positions. An insulating barrier is disposed between the movable contact and the operating mechanism to electrically insulate the current carrying parts from the operating mechanism. -1-

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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 January 6, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 6, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 29, 1977
GrantedJanuary 6, 1981
Term endedJanuary 6, 1998
Patent numberCA 1093128 A
Classification (IPC)H01H73/06 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedNov 29, 1977Patent grantedJan 6, 1981Term endedJan 6, 1998

Sources & verification

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