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:
Sep. 09, 2003
Filed:
Mar. 16, 2001
Heribert Lorenz, Gross-Bieberau, DE;
Goldwell GmbH, Darmstadt, DE;
Abstract
The invention concerns a process for the oxidative dyeing of human hair, whereby an aqueous composition having a pH-value between 7.0 and 12.0 is applied to the hair, wherein this Composition (AB) was obtained by admixture of an oxidation dyestuff precursor Composition (A), which comprises at least one developing and at least one coupling substance as well as at least one or more specific metal compounds, having an alkaline pH-value, with a hydrogen peroxide Composition (B), having a pH-value in the acidic range and comprising 0.05 & to 5.0% by weight, calculated to the total composition, of 1-hydroxyethane-1,1-diphosphonic acid and/or the alkali or ammonium salts thereof.