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:
Nov. 05, 1996
Filed:
Sep. 29, 1995
Applicant:
Inventors:
Stephen R Wurzburger, Goodyear Bar, CA (US);
James M Overton, Yuba City, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23G / ;
U.S. Cl.
CPC ...
134-2 ; 134-3 ; 134 10 ; 134 26 ; 134 27 ; 134 28 ; 134 29 ; 134 41 ; 252 792 ; 510108 ; 510254 ; 510272 ;
Abstract
A solution and solution concentrate for cleaning metal surfaces, particularly aluminum surfaces in which CaO or Ca (OH).sub.2 is added to sulfuric acid to raise the pH to about 13.1 after which the solution is passed through an eleven micron filter and potassium hydroxide is added to raise the pH to greater than 13.8. The resulting concentrate is diluted with water to an appropriate degree, generally 15 parts concentrate to 85 parts of water such as to bring the pH down to a working range of 8.5 to 11.0, degree of dilution depending on the usage.