Aluminum alloys having improved cast surface quality
CA 2424595 C · Owner: Arconic Inc. · Inventors: Wiesner, Jeffrey J; Deyoung, David H.; Mcginnis, William F
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aluminum alloy compositions are disclosed which include small amounts of , calcium that result in improved surface properties of the cast aluminum. The calcium, and up to 0.25% grain refiners are added along with alkaline earth , metals transition metals and/or rare earth metals to the aluminum alloy as a melt. The addition results in improved appearance substantially reduced , surface imperfections and reduced surface oxidation in cast ingot aluminum and aluminum alloys. The addition of small amounts of these additives surprisingly were found to substantially eliminate vertical folds pits and , ingot cracking in more than one ingot casting technique. The additions also improved the …
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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 September 21, 2001 and granted November 27, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 21, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.