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:
Dec. 27, 1994
Filed:
Sep. 20, 1990
Lion Corporation, Tokyo, JP;
Abstract
Methods and compositions for restoring grayed hair to its natural color comprising at least one compound of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each represents a hydrogen atom, an acyl group having 5 to 15 carbon atoms derived from a monocarboxylic acid having 5 to 15 carbon atoms or an acyl group having 2 to 15 carbon atoms derived from a dicarboxylic acid having 2 to 15 carbon atoms or an alkyl group having 1 to 2 carbon atoms; X.sub.1 and X.sub.2, respectively, represent a hydrogen atom, a halogen, or a mercapto group; with the proviso that when R.sub.1, R.sub.2 and R.sub.3 and X.sub.1 are hydrogen atoms at the same time, X.sub.2 is not a halogen atom or a mercapto group, and M.sub.1 represents a hydrogen atom, an alkali metal or tris(hydroxymethyl)aminomethane.