Aluminum alloy composition and methods of manufacture
CA 2212366 C · Owner: Reesor, Douglas Neil · Inventors: Nadkarni, Sadashiv Kashinath; Reesor, Douglas Neil; Davisson, Thomas Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a new aluminum-based alloy having properties which mimic homogenized DC cast 3003 alloy, and a low-cost method for manufacturing the alloy. The alloy contains 0.40 % to 0.70 % Fe 0.10 % to less than 0.30 % , Mn, more than 0.10 % to 0.25 % Cu less than 0.10 % Si, optionally up to 0.10 % Ti, and the balance Al and incidental impurities. The alloy achieves properties similar to homogenized DC cast 3003 alloy when continuously cast followed by cold rolling and, if desired annealing at final gauge. , Surprisingly no other heat treatments are required.
Read the whole patent
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 February 27, 1996 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2018.
- 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.