Aluminum foil product and manufacturing method
CA 2104335 C · Owner: Soares, Marcio Douglas · Inventors: Soares, Marcio Douglas; Maiwald, Klaus Peter; Clemente, Aldenir Jose
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is claimed an aluminum alloy sheet product having a composition consisting essentially of: about 1.35-1.6 wt.% iron; about 0.3-0.6 wt.% manganese, about 0.1-0.4 (and preferably about 0.22-0.4) wt.% copper; about 0.05-0.1 wt.% titanium; about 0.01-0.02 wt.% boron; up to about: 0.2 wt.% silicon 0.02 wt.%, chromium, 0.005 wt.% magnesium and 0.05 wt.% zinc; and a balance of aluminum, incidental elements and impurities. This composition is cast to an initial thickness greater than about 3 mm (0.12 inch). The end product exhibits improved strength and surface properties through a manufacturing process which includes: heat treating at one or more temperatures above about 450°C (842°F) and …
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 August 18, 1993 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2015.
- 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.