Patents by Inventor Wilfried Hansmann

Wilfried Hansmann 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).

  • Water-soluble fiber-reactive dyes, processes for their preparation, and their use
    Patent number: 6060591
    Abstract: The disclosed dyes (which are fiber-reactive and are useful for dyeing materials containing OH and/or carboxamide groups) are compounds of the formula (1)Fb--Z.sub.n (1)in which:Fb is the radical of various classes of dyestuffs, including the formazans, azomethines, phthalocyanines, etc., and particularly sulfo group-containing monoazo or disazo dyes of the formulas (a-1) through (a-5):D.sup.1 --N.dbd.N--K.sup.2 -- (a-1)--D.sup.2 --N.dbd.N--(E--N.dbd.N).sub.v --K.sup.1 (a-2)--D.sup.2 --N.dbd.N--(E--N.dbd.N).sub.v --K.sup.2 -- (a-3)D.sup.1 --N.dbd.N--K.sup.0 --N.dbd.N--D.sup.2 -- (a-4)--D.sup.1 --N.dbd.N--K.sup.0 --N.dbd.N--D.sup.2 -- (a-5)in which in which D.sup.1 is a substituted or unsubstituted phenyl or naphthyl radical, D.sup.2 is the radical of a diazo component and K.sup.1, K.sup.2, and K.sup.0 are various coupling components, and E is a middle component.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: May 9, 2000
    Assignee: Dy Star Textilfarben GmbH & Co. Deutschland K.G.
    Inventors: Wilfried Hansmann, Hermann Henk, Stefan Ehrenberg, Wolfram Reddig
  • Water-soluble fiber-reactive dyes, preparation thereof and use thereof
    Patent number: 6046311
    Abstract: Dyes containing a 5,6-difluoropyrimidin-4-yl radical as fiber-reactive group are useful for dyeing hydroxy- and/or carboxamido-containing material, including fiber material, for example cellulose fibers, wool and polyamide.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: April 4, 2000
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Wilfried Hansmann, Hermann Henk, Stefan Ehrenberg, Wolfram Reddig
  • Process for preparing 2,4,6-trichloropyrimidine
    Patent number: 5712394
    Abstract: Process for preparing 2,4,6-trichloropyrimidine, characterized in that, in a first reaction step, barbituric acid is reacted, optionally in the presence of a catalyst, with phosphorus oxychloride and subsequently, in a second reaction step, with phosphorus pentachloride or with reactants forming the latter, in particular phosphorus trichloride and chlorine.
    Type: Grant
    Filed: June 3, 1996
    Date of Patent: January 27, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilfried Hansmann, Stefan Ehrenberg, Frank-Michael Stohr
  • Naphthylazonaphthol dyes which contain a 5-chloro-6-fluoropyrimidin-4-yl reactive group
    Patent number: 5498700
    Abstract: Reactive dyestuffs of the formula ##STR1## produce bluish red dyes having excellent fastness properties on hydroxyl- and amido-containing fibre material.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: March 12, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Henk, Wilfried Hansmann