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:
Jul. 31, 2001
Filed:
Aug. 06, 1999
Applicant:
Inventors:
Martin Philip Amor, Banbury, GB;
Jonathan Ball, Allcester, GB;
Assignee:
Alcan International Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F 1/00 ;
U.S. Cl.
CPC ...
C25F 1/00 ;
Abstract
Surface defects on rolled alulminium alloy sheet, particularly that intended for use as lithographic plate substrate, are caused by copper-containing particles. The invention provides a method of improving the sheet by removing the particles by anodising in an aggressive electrolyte, particularly a.c. anodising at a current density of at least 2 kAm,.