Patents by Inventor Thomas Hundsdorf

Thomas Hundsdorf 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).

  • Method for the production of pure C.I. pigment orange 74
    Patent number: 8329369
    Abstract: The invention relates to a method for conditioning and purifying pigment orange 74. The method is characterized in that the aqueous suspension of the raw pigment, optionally after adding an organic solvent from the group comprising isobutanol, chlorobenzene and o-dichlorobenzene, is subjected to a finishing treatment, the organic solvent is optionally removed using a distillation process, the remaining aqueous pigment suspension is mixed with a non-ionic surfactant and is heated to a temperature ranging from 30 to 100° C. and the pigment is then filtered off.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: December 11, 2012
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Thomas Hundsdorf, Willi Rauschmann
  • Method for the Production of Pure C.I. Pigment Orange 74
    Publication number: 20100178607
    Abstract: The invention relates to a method for conditioning and purifying pigment orange 74. The method is characterized in that the aqueous suspension of the raw pigment, optionally after adding an organic solvent from the group comprising isobutanol, chlorobenzene and o-dichlorobenzene, is subjected to a finishing treatment, the organic solvent is optionally removed using a distillation process, the remaining aqueous pigment suspension is mixed with a non-ionic surfactant and is heated to a temperature ranging from 30 to 100° C. and the pigment is then filtered off.
    Type: Application
    Filed: May 21, 2008
    Publication date: July 15, 2010
    Applicant: CLARIANT FINANCE (BVI) LIMITED
    Inventors: Thomas Hundsdorf, Willi Rauschmann
  • Method for distortion-free pigmentation of partly-crystalline plastics with phthalocyanine pigments
    Patent number: 7348372
    Abstract: A method for distortion-free pigmentation of partly-crystalline plastics, characterized in that a phthalocyanine pigment is used which has been heated to a temperature of at least 80° C. as a suspension in an acid-free organic medium in the presence of a base.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: March 25, 2008
    Assignee: Clariant Produkte (Deutschland) GmbH
    Inventors: Hans Joachim Metz, Thomas Hundsdorf, Klaus Brychcy, Andreas Stohr
  • Pigment preparations based on diketopyrrolopyrrole pigments for the undistorted pigmentation of partially crystalline plastics
    Patent number: 7153358
    Abstract: A pigment preparation comprising a) at least one diketopyrrolopyrrole pigment of the formula (V) as a base pigment and b) at least one pigment dispersing agent based on sulphonated diketopyrrolopyrrole derivatives and the use thereof for the undistorted coloration of plastics
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: December 26, 2006
    Assignee: Clariant GmbH
    Inventors: Joachim Weber, Thomas Hundsdorf, Matthias Ganschow
  • Method for distortion-free pigmentation of partly-crystalline plastics with phthalocyanine pigments
    Publication number: 20060155014
    Abstract: The invention relates to a method for distortion-free pigmentation of partly-crystalline plastics, chraracterised in that a phthalocyanine pigment is used which has been heated to a temperature of at least 80° C. as a suspension in an acid-free organic medium in the presence of a base.
    Type: Application
    Filed: January 31, 2003
    Publication date: July 13, 2006
    Inventors: Hans Metz, Thomas Hundsdorf, Klaus Brychcy, Andreas Stohr
  • Pigment preparations based on diketopyrrolopyrrole pigments for the undistorted pigmentation of partially crystalline plastics
    Publication number: 20060052490
    Abstract: The invention relates to a pigment preparation, characterised in containing a) at least one diketopyrrolopyrrole pigment of formula (V) as base pigment and b) at least one pigment-dispersing agent based on sulphonated diketopyrrolopyrrole derivatives and the use thereof for the undistorted colouration of plastics.
    Type: Application
    Filed: July 2, 2003
    Publication date: March 9, 2006
    Inventors: Joachim Weber, Thomas Hundsdorf, Matthias Ganschow