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:
May. 04, 2004
Filed:
Jul. 11, 2001
Applicant:
Inventors:
Peter Robert Foley, Cincinnati, OH (US);
Xiaoqing Song, West Chester, OH (US);
Lucio Pieroni, Hyogo, JP;
Assignee:
The Procter & Gamble Company, Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 3/40 ; C11D 3/37 ;
U.S. Cl.
CPC ...
C11D 3/40 ; C11D 3/37 ;
Abstract
A method for improving stability of a dye used in a colored aqueous acidic rinse aid composition to ambient and ultra-violet light radiation is disclosed. The method includes the step of adding a chelant to an acidic rinse aid composition. The chelant is present in an amount of at least 1 ppm by weight of the rinse aid composition.