Copper alloy and process for obtaining same
CA 2270627 C · Owner: Bhargava, Ashok K. · Inventors: Bhargava, Ashok K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.