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. 21, 2019
Filed:
May. 29, 2015
L'oreal, Paris, FR;
Shiho Miyake, Kawasaki, JP;
Hidetoshi Yamada, Kawasaki, JP;
Shoji Maruyama, Kawasaki, JP;
Daisuke Misu, Kawasaki, JP;
L'OREAL, Paris, FR;
Abstract
The present invention relates to a composition for dyeing keratin fibers, comprising (a) at least one direct dye; and (b) at least one sulfone compound represented by the following formula (I): wherein each of Rand Rindependently denotes a monovalent Caliphatic group or a monovalent Caromatic group, which may optionally be substituted with at least one substituent; or Rand R, together with the sulfur atom which they are binding, form a 3-10 membered ring which may optionally be substituted with at least one substituent. The composition according to the present invention is a one-part composition and can prevent or reduce skin staining by the direct dye on the skin such as the scalp, while providing the keratin fibers with good cosmetic effects such as good coloring properties.