Patents by Inventor Martin Oberholzer

Martin Oberholzer 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).

  • Basic bisazo compounds
    Patent number: 8921564
    Abstract: The invention relates to basic bisazo compounds according to formula (I) wherein all substituents are defined as in Claim 1, their production, their use as dyestuffs as well as material dyed with these dyestuffs.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: December 30, 2014
    Assignee: Clariant Finance (BVI) Ltd.
    Inventors: Ludwig Hasemann, Friedrich Lehr, Martin Oberholzer, Heidrun Schene
  • Storage stable solutions of optical brighteners
    Patent number: 8894815
    Abstract: The instant invention relates to storage stable solutions of optical brighteners based on certain salt forms of anilino-substituted bistriazinyl derivatives of 4,4?-diaminostilbene-2,2?-disulphonic acid and of organic acids which do not need extra solubilizing additives.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: November 25, 2014
    Assignee: Clariant Finance (BVI) Limited
    Inventors: John Martin Farrar, Andrew Clive Jackson, Margaret Mahon, Martin Oberholzer
  • Storage stable solutions of optical brighteners
    Patent number: 8784612
    Abstract: The instant invention relates to storage stable solutions of optical brighteners based on certain salt forms of anilino-substituted bistriazinyl derivatives of 4,4?-diaminostilbene-2,2?-disulphonic acid and of organic acids which do not need extra solubilizing additives.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: July 22, 2014
    Assignee: Clariant Finance (BVI) Limited
    Inventors: John Martin Farrar, Andrew Clive Jackson, Margaret Mahon, Martin Oberholzer
  • STORAGE STABLE SOLUTIONS OF OPTICAL BRIGHTENERS
    Publication number: 20100294447
    Abstract: The instant invention relates to storage stable solutions of optical brighteners based on certain salt forms of anilino-substituted bistriazinyl derivatives of 4,4?-diaminostilbene-2,2?-disulphonic acid and of organic acids which do not need extra solubilising additives.
    Type: Application
    Filed: December 9, 2008
    Publication date: November 25, 2010
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: John Martin Farrar, Andrew Clive Jackson, Margaret Mahon, Martin Oberholzer
  • Basic Bisazo Compounds
    Publication number: 20100000033
    Abstract: The invention relates to basic bisazo compounds according to formula (I) wherein all substituents are defined as in Claim 1, their production, their use as dyestuffs as well as material dyed with these dyestuffs.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 7, 2010
    Applicant: Clariant Finance (BVI) Limited
    Inventors: Ludwig Hasemann, Friedrich Lehr, Martin Oberholzer, Heidrun Schene
  • Azo dyestuffs
    Patent number: 7371831
    Abstract: Compounds of formula (I) wherein all substituents have the meanings as defined in the Specification, their production and their use.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: May 13, 2008
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Martin Oberholzer, Jürgen Geiwiz
  • Concentrated Dye Solution
    Publication number: 20070251030
    Abstract: Concentrated aqueous dye solutions comprising one or more cationizable dyes, an organic acid and water and their use for dyeing and/or printing organic substrates and for producing inkjet printing inks.
    Type: Application
    Filed: May 17, 2005
    Publication date: November 1, 2007
    Inventor: Martin Oberholzer
  • Azo dyestuffs
    Publication number: 20040083924
    Abstract: Compouns of formula (I) 1
    Type: Application
    Filed: August 1, 2003
    Publication date: May 6, 2004
    Inventor: Martin Oberholzer
  • Fiber-reactive disazo dyestuffs
    Patent number: 6319290
    Abstract: Compounds of the general formula (I) wherein R1 represents hydrogen or a C1-C4-alkyl group, X represents the radical of aliphatic, cyclic or aromatic diamines and Y represents hydrogen or an alkali metal, and a process for their preparation and their use for dyeing organic substrates, and organic substrates dyed with these compounds.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: November 20, 2001
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Detlef Kalweit, Martin Oberholzer