Production of ultra-fine grain structure in as-cast aluminum alloys
CA 2361484 A1 · Owner: Alcoa Inc. · Inventors: Chu, Men Glenn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of controlling grain size in as-cast aluminum alloy having the steps of a) providing a molten aluminum alloy including an alloying element, selected from the group consisting of Ti Sc, Zr, V, Hf, Nb and Y; b) adding a, grain refiner to the molten aluminum alloy to form a melt; and c) solidifying the, melt to form an ingot. The grain refiner includes Ti and B or C and is added , to, the melt in an amount to yield the concentration in the melt of B or C from the, grain refiner of about 0.003-0.010 wt. %. Grains in the as-cast aluminum alloy are, about 200 microns or less in size.
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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 November 8, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2023.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.