Patents by Inventor Walter Zoller

Walter Zoller 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 perylene dyestuffs, their preparation and their use
    Patent number: 5948910
    Abstract: Water-soluble perylene dyestuffs, their preparation and their useThe present Application relates to water-soluble perylene dyestuffs of the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another are the radicals A--X--COOM or A--X--SO.sub.3 M;R.sup.3 and R.sup.4 independently of one another are the radicals R.sup.1 or R.sup.2, or are OR.sup.5 or NR.sup.6 R.sup.7 ;A is NR.sup.8 or S;X is a straight-chain or branched alkylene radical, a straight-chain or branched alkylene radical which is substituted by hydroxyl, carboxyl or amino, an arylene radical or an arylene radical which is optionally substituted by hydroxyl, carboxyl or sulfo;R.sup.5, R.sup.6 and R.sup.7 independently of one another are hydrogen, (C.sub.1 -C.sub.4)-alkyl or (C.sub.1 -C.sub.4)-alkyl which is substitituted by one or more hydroxyl, 2-hydroxyethoxy, (C.sub.1 -C.sub.4)-alkoxy or amino groups;R.sup.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: September 7, 1999
    Assignee: Clariant GmbH
    Inventors: Wolfgang Bauer, Dieter Baumgart, Dieter Schnaitmann, Klaus-Peter Kreutzer, Walter Zoller
  • Water-soluble copper phthalocyanine dyestuffs, their preparation and their use
    Patent number: 5882360
    Abstract: The present application relates to water-soluble copper phthalocyanine dyestuffs of the formula I ##STR1## in which CuPc is a copper phthalocyanine radical;X is a straight-chain or branched alkylene having 2 to 6 carbon atoms;Y is a straight-chain or branched alkylene having 2 to 6 carbon atoms or a straight-chain or branched alkylene having 1 to 6 carbon atoms which is substituted by hydroxyl, carboxyl or amino;R.sup.1 and R.sup.2 independently of one another are hydrogen or alkyl having 1 to 4 carbon atoms;R.sup.3 represents hydrogen, alkyl having 1 to 4 carbon atoms, hydroxyalkyl having 1 to 4 carbon atoms or aminoalkyl having 1 to 4 carbon atoms;R.sup.
    Type: Grant
    Filed: August 24, 1997
    Date of Patent: March 16, 1999
    Assignee: Clariant GmbH
    Inventors: Wolfgang Bauer, Dieter Baumgart, Walter Zoller, Klaus-Peter Kreutzer
  • Benzothioxanthene dyes, their preparation and their use
    Patent number: 5783710
    Abstract: The present invention relates to benzothioxanthene dyes of the formula I, ##STR1## in which R.sup.1 is SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5, R.sup.2 and R.sup.3 independently of one another are hydrogen, SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5 and X, Y, n, R.sup.4, R.sup.5 and M.sup..sym. are as defined in claim 1, to their preparation and to their use, especially in inks and recording liquids.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: July 21, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wolfgang Bauer, Dieter Baumgart, Walter Zoller
  • Tetrakisazo Compounds, the method of preparation thereof and the process of pyeing
    Patent number: 5668260
    Abstract: The present invention relates to tetrakisazo dyes of the general formula I ##STR1## in which ##STR2## and R.sup.1, R.sup.2, R.sup.3, M.sup..sym.1 to M.sup..sym.1 and n are as defined in Claim 1, to processes for their preparation and to their use.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: September 16, 1997
    Assignee: Hoecht Aktienge Sellschaft
    Inventors: Wolfgang Bauer, Dieter Baumgart, Walter Zoller
  • Water-soluble polyazo dyestuffs
    Patent number: 5597387
    Abstract: The present invention relates to water-soluble polyazo dyestuffs of the general formula I ##STR1## wherein Y, Z, m and M.sup..sym.1 to M.sup..sym.4 are as defined in claim 1, processes for dyeing leather and paper with the polyazo dyestuffs, and recording liquids and inks containing the polyazo dyestuffs.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: January 28, 1997
    Assignee: Hoechst AG
    Inventors: Wolfgang Bauer, Dieter Baumgart, Walter Zoller