Hypereutectic aluminum silicon alloy
CA 2014592 C · Owner: Donahue, Raymond J. · Inventors: Donahue, Raymond J.; Hesterberg, William G.; Cleary, Terrance M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hypereutectic aluminum silicon alloy having an improved distribution of primary silicon in the microstructure. The alloy is composed by weight of 20% to 30% silicon, 0.4% to 1.6% magnesium, up to 1.4% iron up to, 0.3% manganese, 0.25% copper maximum and the balance aluminum. With this composition the aluminum silicon alloy system exhibits near zero shrinkage on solidification a, similarity of the liquid aluminum-silicon alloy and the primary silicon during the early stages of primary silicon precipitation, and thereby minimizes floatation of the precipitated primary silicon and to provide a more uniform distribution of the primary silicon in the microstructure and increase the wear …
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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 April 12, 1990 and granted February 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2012.
- 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.