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:
Feb. 13, 1990
Filed:
Jan. 11, 1988
Applicant:
Inventors:
James D Mitchell, Pleasanton, CA (US);
James P Farr, Pleasanton, CA (US);
Assignee:
The Clorox Company, Oakland, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C11D / ; D06L / ;
U.S. Cl.
CPC ...
252 95 ; 8111 ; 25218628 ; 25218629 ; 25240021 ; 252404 ; 423272 ; 423584 ;
Abstract
Aqueous peroxide bleaching compositions that include surfactant, fluorescent whiteners and dyes are effectively stabilized by the addition of a heavy metal chelating agent and a free radical scavenging agent. Both agents must be present to achieve maximum stability. Particularly preferred chelating agents are the amino polyphosphonates. Particularly preferred free radical scavenging agents are the hydroxybenzenes and especially substituted phenols. Not only is the peroxide oxidizing agent stabilized, but surfactant, fluorescent whitener, and dye as well.