Patents by Inventor Werner Saar

Werner Saar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for mass-coloring nylon with 1:2 chromium complex azo dye
    Patent number: 4527994
    Abstract: Process for mass-coloring nylon in dark brown, dark violet and black shades, which comprises using as dye either mixtures of the 1:2 chromium complex of a monoazo dye of the formula I ##STR1## and the 1:2 chromium complex of a monoazo dye of the formula II ##STR2## or a mixed 1:2 chromium complex of a monoazo dye each of the formula I and the formula II in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are as defined in claim 1.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: July 9, 1985
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul Lienhard, Werner Saar
  • Preparations for coloring molten thermoplastic polymers
    Patent number: 4094839
    Abstract: Preparations which contain 10 to 70% by weight of a pigment or a polymer-soluble colorant and 90 to 30% by weight of a carrier mixture which is composed of 51 to 95% by weight of a metal salt of an aliphatic carboxylic acid containing at least 12 carbon atoms, said metal selected from the group consisting of calcium, barium, zinc, aluminum, and magnesium, and of 49 to 5% by weight of an elastomeric or thermoplastic polymer are useful for coloring molten thermoplastic polymers in level shades.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: June 13, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Albert Riegler, Werner Saar, Volkhard Wiese