Rolled aluminum alloy adapted for superplastic forming and method for making
CA 2044181 C · Owner: Matsuo, Mamoru · Inventors: Matsuo, Mamoru; Tagata, Tsutomu; Komatsubara, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Provided is a superplastic forming aluminum alloy in rolled form which exhibits superplasticity and has improved corrosion resistance, weldability, and strength and fatigue property after superplastic forming, eliminating a need for heat treatment after superplastic forming. Preferred alloys have an excellent outer appearance of grey to black color after anodization. The alloy consists essentially of in %, by weight, 2.0-8.0% of Mg, 0.3-1.5% of Mn 0.0001-0.01% of, Be, an optional element selected from C V, and Zr, an, optional grain refining agent of Ti or Ti and B less than, 0.2% of Fe and less than 0.1% of Si as impurities and the, balance of Al, wherein intermetallic compounds have a …
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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 10, 1991 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.
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.