Patents Assigned to Combe, Inc.
  • Hair dyeing composition containing bismuth citrate, triethanolamine and sulfur
    Patent number: 3954393
    Abstract: A composition for dyeing hair comprising the product formed by contacting bismuth citrate, triethanolamine and sulfur in the presence of water. The product is stable in solution; in use the product is applied to human hair, as on the scalp, and thereupon effects a darkening of the hair.
    Type: Grant
    Filed: August 29, 1973
    Date of Patent: May 4, 1976
    Assignee: Combe, Inc.
    Inventor: Herbert Lapidus