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Expired Canadian patentCanada

Laminated copper assembly

CA 1338593 C · Owner: Westinghouse Electric Corporation · Inventors: Paton, Charles Richard

CIPO record

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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 laminated contact assembly is formed from a number of individual contact assemblies. Each individual contact assembly includes a contact arm portion, which carries a movable main or arcing contact and a stationary conductor portion. A flexible shunt is used to connect the contact arm portion to the stationary conductor portion. Intermediate individual contact assemblies are provided with T-shaped slots for receiving square-headed fasteners. These square-headed fasteners are captured by adjacent assemblies once the laminated contact assembly is complete. By providing such an arrangement the need to, drill and tap holes in the base of the laminated contact arm assembly is obviated. Since …

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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 September 10, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 1, 1989
GrantedSeptember 10, 1996
Term endedSeptember 10, 2013
Patent numberCA 1338593 C
Classification (IPC)H01H71/00

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedAug 1, 1989Patent grantedSep 10, 1996Term endedSep 10, 2013

Sources & verification

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