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Expired Canadian patentCanada

Copper alloy and process for obtaining same

CA 2270627 C · Owner: Bhargava, Ashok K. · Inventors: Bhargava, Ashok K.

CIPO record

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Abstract From the Canadian patent

A copper base alloy consisting essentially of tin in an amount from about 0.1 to about 1.5 % by weight, phosphorous in an amount from about 0.01 to about 0.35 % by weight, iron in an amount from about 0.01 to about 0.8 % by weight zinc in an amount from about 1.0 to about 15 % by weight and the balance , essentially copper, including phosphide particles uniformly distributed throughout the matrix, is described. The alloy is characterized by an excellent combination of physical properties. The process of forming the copper base alloy described herein includes casting homogenizing, rolling, process annealing and stress relief annealing.

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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 24, 1998 and granted May 13, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 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 24, 1998
GrantedMay 13, 2003
Term endedJune 24, 2018
Patent numberCA 2270627 C
Classification (IPC)C22C9/02 +2 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedJune 24, 1998Patent grantedMay 13, 2003Term endedJune 24, 2018

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