Copper/zinc/silicon alloy, use and production thereof
CA 2582972 C · Owner: Rexer, Ulrich · Inventors: Strobl, Heinz; Marstaller, Klaus; Mayer, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a Cu-Zn-Si alloy comprising 70-80 wt. % copper 1 -5 , wt. % silicon, 0.0001 0.5 % boron up to 0.2 % phosphorus and/or up to 0.2 % arsenic, the rest being zinc in addition to unavoidable impurities. The information further relates to the use and production of said alloy. The alloy is characterized by improved resistance to oxidation and by uniform mechanical properties.
Read the whole patent
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 May 13, 2005 and granted February 4, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.