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. 21, 1995
Filed:
Sep. 08, 1994
Applicant:
Inventors:
Petrus A Angevaare, Ho-Ho-Kus, NJ (US);
Richard G Gary, West New York, NJ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11D / ; C11D / ; C11D / ; C11D / ;
U.S. Cl.
CPC ...
252 95 ; 252 99 ; 252102 ; 252135 ; 252156 ; 25217412 ; 252390 ; 252394 ; 252524 ; 252542 ; 134 252 ;
Abstract
A detergent composition which prevents tarnishing of silver and silver-plated articles is described. The composition comprises 1-20 weight percent of a peroxygen or hypohalite bleaching agent, 0.05 to about 10 weight percent of a purine class compound used as a silver anti-tarnishing agent, from 1 to 75 weight percent of a builder, and 0 to 40 weight percent of a surfactant provided that the pK.sub.a of the purine class compound is below a pH of an aqueous solution of the composition in which it is incorporated. A method of using the composition is also described.