Processing aluminum alloys
CA 1074675 A · Owner: Swiss Aluminium Limited · Inventors: Sperry, Philip R.; Setzer, William C.; Gullotti, Damian V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of heat treating aluminum alloys of the aluminummagnesium-silicon type to improve processibility by extrusion. The method comprises initially homogenizing the alloys at an elevated temperature below the equilibrium solidus temperature of the alloy for from 2 to 12 hours further homogeni-, zing said alloys at an elevated temperature below the initial homogenization temperature and below the solvus temperature of the alloy for from 2 to 12 hours and slowly cooling said alloys to at least 800°F at a rate of less than 100°F per hour.
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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
- Granted April 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 1997.
- 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.