Patent number: 6068834
Abstract: This invention relates to compositions, compounds and methods for lightening skin, using active compounds having the structure: ##STR1## wherein: (i) each X is, independently, selected from the group consisting of halo, alkyl, substituted alkyl, aryl, OR, OCOR, COR, CONRR COOR, CN, SR, SOR, SO.sub.2 R, SO.sub.3 R and NRR, wherein X is other than hydroxy, amino and thio, if this X is attached ortho to the phenol hydroxy;(ii) m is an integer from 0 to 4;(iii) each R' and each R" is, independently, selected from the group consisting of hydrogen, halo, alkyl, substituted alkyl, aryl, OR, OCOR, OCRROR, COR, CR(OR)OR, CONRR, COOR, CRROR, CN, SR, and NRR; wherein halo, when it appears, is other than geminal to a hydroxy, NH.sub.
Type:
Grant
Filed:
February 24, 1995
Date of Patent:
May 30, 2000
Assignee:
The Procter & Gamble Company
Inventors:
Kalla Lynn Kvalnes, Mitchell Anthony DeLong, Barton James Bradbury, Curtis Bobby Motley, John David Carter