Patents by Inventor Hans Altermatt

Hans Altermatt 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 dyeing leather with an aqueous bath containing sulfonated carbon black and black anionic dye
    Patent number: 5152801
    Abstract: There is disclosed a process for dyeing leather by the exhaust process, which comprises treating leather with an aqueous liquor which contains a formulation comprising a black anionic dye and a sulfonated carbon black. The leather dyeings obtained by this process have good allround fastness properties.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: October 6, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans Altermatt, Alois Puntener, Peter Moser, Ernst Tempel
  • Vattable 2-aryl-4,6-diaminopyrimidines
    Patent number: 4845220
    Abstract: The invention relates to vattable 2-aryl-4,6-diaminopyrimidines of formula ##STR1## wherein A.sub.1 and A.sub.2 are identical or different vattable radicals, andAr is an aryl radical.These pyrimidines are particularly suitable vat dyes for dyeing or printing textile fibres made from natural or regenerated cellulose. They give light- and wetfast orange, red or violet dyeings.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: July 4, 1989
    Inventor: Hans Altermatt
  • Anthrimidecarbazole compound having thenoylamino groups
    Patent number: 4772725
    Abstract: Novel anthrimidecarbazole compound of the formula ##STR1## as an olive-coloring vat dye exhibiting an increased ability to reflect infra-red light.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 20, 1988
    Assignee: Ciba-Geigy Corporation
    Inventor: Hans Altermatt
  • Process for dyeing high-molecular organic material in the melt
    Patent number: 4211688
    Abstract: Process for the dyeing of high-molecular organic material in the melt, in which process there is used as coloring substance an anthraquinone compound of the formula ##STR1## wherein R represents straight-chain or branched-chain alkyl having 1 to 17 C atoms, X.sub.1 and X.sub.2 represent hydrogen or benzoylamino, or X.sub.1 represents hydrogen and X.sub.2 represents benzoylamino.
    Type: Grant
    Filed: June 6, 1978
    Date of Patent: July 8, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans Altermatt, Arnold Wick
  • Triazinyl dyes
    Patent number: 3972881
    Abstract: Vat dyestuffs of the formula ##EQU1## wherein R represents alkyl with 1 to 4 carbon atoms, R.sub.1 and R.sub.2 represent hydrogen or alkyl with 1 to 4 carbon atoms and each of A.sub.1 and A.sub.2 represents a vattable radical with 3 to 7 condensed rings are characterized by improved resistance to alkali and are suitable for dyeing and printing the most diverse materials, in particular fibers made from natural or regenerated cellulose.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: August 3, 1976
    Assignee: Ciba-Geigy Corporation
    Inventor: Hans Altermatt
  • Triazinyl vat dyestuffs
    Patent number: 3935208
    Abstract: Vat dyestuffs of the formula ##EQU1## wherein R.sub.1 and R.sub.2 each represent a hydrogen atom or a low molecular alkyl radical and A.sub.1 and A.sub.2 represent a different or similar vattable radical with 3 to 6 condensed rings, are suitable for dyeing and printing the most varied materials, in particular for dyeing and printing fibres made from natural or regenerated cellulose in the presence of a reducing agent.
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: January 27, 1976
    Inventor: Hans Altermatt