Patents by Inventor Eduard Burtscher

Eduard Burtscher 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).

  • Mediator systems based on mixed metal complexes, used for reducing dyes
    Patent number: 6790241
    Abstract: Mediator systems obtainable by mixing a salt of an electrochemically active complexing metal (M1) capable of forming a plurality of valence states with a hydroxyl-containing complexing agent, which may likewise be present as salt, and with a salt of an electrochemically inactive complexing metal (M2) in an alkaline aqueous medium, wherefor the molar ratio of metal ion M2 to metal ion M1 is from 0.8:1 to 2:1 are useful for reducing dyes and dyeing cellulosic textile material.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 14, 2004
    Assignee: DyStar Textilfarben GmbH & Co. Deutschland KG
    Inventors: Thomas Bechtold, Eduard Burtscher, Wolfgang Schrott, Norbert Grund, Peter Maier, Georg Schnitzer, Franz Sütsch
  • Mediator systems based on mixed metal complexes, used for reducing dyes
    Publication number: 20030088926
    Abstract: Mediator systems obtainable by mixing a salt of an electrochemically active complexing metal (M1) capable of forming a plurality of valence states with a hydroxyl-containing complexing agent, which may likewise be present as salt, and with a salt of an electrochemically inactive complexing metal (M2) in an alkaline aqueous medium, wherefor the molar ratio of metal ion M2 to metal ion M1 is from 0.8:1 to 2:1 are useful for reducing dyes and dyeing cellulosic textile material.
    Type: Application
    Filed: October 15, 2002
    Publication date: May 15, 2003
    Inventors: Thomas Bechtold, Eduard Burtscher, Wolfgang Schrott, Norbert Grund, Peter Maier, Georg Schnitzer, Franz Sutsch
  • Process for reducing sulphide dyestuffs
    Patent number: 6312583
    Abstract: In a method of producing reduced sulfur dyes, the improvement comprising cathodically reducing a sulfur dye to produce at least 150 Ah.kg−1 of reduction equivalents with respect to the solid dye, wherein at least 50 Ah.kg−1 is introduced by cathodic reduction.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: November 6, 2001
    Assignee: BASF Aktiengesellschaft
    Inventors: Thomas Bechtold, Eduard Burtscher
  • Process for reduction of textile dyestuffs
    Patent number: 5443599
    Abstract: A process comprising the reduction of textile dyestuffs in an aqueous alkaline medium by means of a reducing compound which is a complex of an organic complexing agent and an iron (II)-salt. The iron (II)-salt is present in an amount sufficient to ensure the desired reduction of the dyestuff after a single oxidation.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: August 22, 1995
    Assignee: Verein zur Forderung der Forschung und Entwicklung in der Textilwirtschaft
    Inventors: Thomas Bechtold, Eduard Burtscher