Patents by Inventor Hakan Wennerstrom

Hakan Wennerstrom 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).

  • Pigments modified with surface counter-ions
    Patent number: 7695555
    Abstract: The present invention relates to inkjet ink pigments having surface counter-ions replaced with other counter-ions with larger size and/or hydrophobicity. The effect of the replacement is to decrease pigment-ink-vehicle-separation in the inkjet ink printing process.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 13, 2010
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alexey S Kabalnov, Hakan Wennerstrom
  • PIGMENTS MODIFIED WITH SURFACE COUNTER-IONS
    Publication number: 20080152808
    Abstract: The present invention relates to inkjet ink pigments having surface counter-ions replaced with other counter-ions with larger size and/or hydrophobicity. The effect of the replacement is to decrease pigment-ink-vehicle-separation in the inkjet ink printing process.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 26, 2008
    Inventors: Alexey S. Kabalnov, Hakan Wennerstrom
  • Pigments modified with surface counter-ions
    Publication number: 20060162612
    Abstract: The present invention relates to inkjet ink pigments having surface counter-ions replaced with other counter-ions with larger size and/or hydrophobicity. The effect of the replacement is to decrease pigment-ink-vehicle-separation in the inkjet ink printing process.
    Type: Application
    Filed: January 25, 2005
    Publication date: July 27, 2006
    Inventors: Alexey Kabalnov, Hakan Wennerstrom