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:
Jun. 27, 2006
Filed:
Mar. 02, 2004
Alexander C Chan, Cranbury, NJ (US);
Stella Arcella, Oakland, NJ (US);
John Brian Bartolone, Bridgeport, CT (US);
Allan Robert Burger, Passaic, NJ (US);
Alexander C Chan, Cranbury, NJ (US);
Stella Arcella, Oakland, NJ (US);
John Brian Bartolone, Bridgeport, CT (US);
Allan Robert Burger, Passaic, NJ (US);
Unilever Home & Personal Care USA, division of Conopco, Inc., Chicago, IL (US);
Abstract
The present invention relates to a 2-step methods, and compositions for providing more vibrant, natural and long-lasting color to hair and at the same time reducing hair fiber damage associated with alternative current methods. In the first step the hair is contacted for a period of time with a dye precursor mixture containing specific oxidative hair dye precursors under conditions where these dyes are substantially inactive. Color is then developed in a second step by contacting the hair with a mixture of a peroxide compound and a persulfate salt. Surprisingly the 2-step method leads to considerable 'lift' or lightening without negatively impacting the coloring ability of the oxidative dye. The invention also relates to kits providing the means to accomplish these steps.