The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2011
Filed:
Jul. 19, 2002
Applicants:
John Andrew Ward, Leamington Spa, GB;
Jonathan Ball, Alcester, GB;
Martin Philip Amor, Cropredy, GB;
Inventors:
John Andrew Ward, Leamington Spa, GB;
Jonathan Ball, Alcester, GB;
Martin Philip Amor, Cropredy, GB;
Assignee:
Novelis Inc., Toronto, Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C25D 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is disclosed a process for producing an aluminium alloy sheet, which comprises subjecting a surface of the sheet to anodising conditions to form on the surface an aluminium oxide barrier layer of thickness 10 to 50 nm and treating the oxide layer with an aqueous solution of alkali to remove the layer, thereby leaving a roughened surface on the alloy sheet.