Patents by Inventor Martin Studer

Martin Studer 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).

  • Patent number: 4263229
    Abstract: Compounds of the formula ##STR1## homogeneous and heterogeneous metal complexes thereof, and mixtures of said compounds and complexes, whereineach A is independently hydroxy or amino,T is carboxy or sulpho,T.sub.1 is hydrogen, nitro, halo, alkyl, substituted alkyl, alkoxy, substituted alkoxy or sulpho,T.sub.2 is hydrogen, nitro, halo, alkyl, substituted alkyl, alkoxy or substituted alkoxy,X is hydrogen, hydroxy, halo, nitro, alkyl, substituted alkyl, alkoxy, substituted alkoxy or sulpho, andY is hydrogen, hydroxy, halo, nitro, alkyl, substituted alkyl, alkoxy, substituted alkoxy or ##STR2## wherein with the proviso that Y is-- ##STR3## when X is other than sulpho, Z is hydrogen, carboxy or a sulpho,Z.sub.1 is hydrogen, hydroxy, nitro, alkyl, substituted alkyl, alkoxy, or substituted alkoxy, andZ.sub.2 is hydrogen or nitro.These dyes are useful for dyeing leather.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: April 21, 1981
    Inventors: Martin Studer, Heinz Wicki
  • Patent number: 4049641
    Abstract: Compounds of the formula ##STR1## wherein A is 1,4-naphthylene, substituted 1,4-naphthylene, 1,4-(5,6,7,8-tetrahydronaphthylene) or substituted 1,4-(5,6,7,8-tetrahydronaphthylene),Wherein each substituent of substituted 1,4-naphthylene and substituted 1,4-(5,6,7,8-tetrahydronaphthylene) is independently lower alkyl, lower alkoxy or halo,D is sulfophenyl or substituted sulfophenyl wherein each substituent is independently lower alkyl, lower alkoxy, nitro or halo,EachR is independently lower alkyl, andn is 0 to 2,And mixtures thereof,Are useful for dyeing and printing natural polyamides such as wool and silk, synthetic polyamides such as nylon, polyacrylonitrile, acrylonitrile copolymers and polyvinyl alcohol on which they build-up well. The dyeings are fast to light and wet treatments.
    Type: Grant
    Filed: December 18, 1975
    Date of Patent: September 20, 1977
    Assignee: Sandoz Ltd.
    Inventor: Martin Studer
  • Patent number: 3951590
    Abstract: Compounds of the formula ##SPC1##WhereinA is 1,4-naphthylene, substituted 1,4-naphthylene, 1,4-(5,6,7,8-tetrahydronaphthylene) or substituted 1,4-(5,6,7,8-tetrahydronaphthylene), wherein each substituent of substituted 1,4-naphthylene and substituted 1,4-(5,6,7,8-tetrahydronaphthylene) is independently lower alkyl, lower alkoxy or halo,D is sulfophenyl or substituted sulfophenyl wherein each substituent is independently lower alkyl, lower alkoxy, nitro or halo,Each R is independently lower alkyl, andn is 0 to 2,And mixtures thereof, are useful for dyeing and printing natural polyamides such as wool and silk, synthetic polyamides such as nylon, polyacrylonitrile, acrylonitrile copolymers and polyvinyl alcohol on which they build-up well. The dyeings are fast to light and wet treatments.
    Type: Grant
    Filed: March 26, 1973
    Date of Patent: April 20, 1976
    Assignee: Sandoz Ltd., (Sandoz AG)
    Inventor: Martin Studer