Group Viii Metal (fe, Co, Ni, Os, Ir, Pt, Ru, Rh, Pd) Patents (Class 8/623)
  • Hair dyeing method
    Patent number: 4302199
    Abstract: A method for coloring hair comprising sequentially treating the hair with a solution of water soluble ferric ion salt and with a carboxylic acid solution.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: November 24, 1981
    Assignee: The Procter & Gamble Company
    Inventor: Prem S. Juneja
  • Process for dyeing or printing synthetic fiber materials by means of disperse dyes, and colorant compositions utilizable for this purpose
    Patent number: 4274831
    Abstract: A process of dyeing or printing of synthetic fiber materials by means of disperse dyes carried out in the presence of at least one derivative of a metal having an atomic number in the range of 24 through 30 to prevent or diminish the degradation of the dye during the dyeing or printing process, and ready-to-use colorant compositions for this process.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: June 23, 1981
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Gerard L.A. Belfort, Daniel P. A. Richer