Patents by Inventor Arnd Kriebel

Arnd Kriebel 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).

  • Ink set for ink jet printing
    Patent number: 7273520
    Abstract: Ink set for ink jet printing comprised of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the yellow ink contains a mixture of at least one yellow dye with reddish hue of formula (I), wherein R, M, R17, R18, p4, n and m are as defined in the specification and at least one yellow dye with greenish hue of formula (II), wherein R, M, R6, R7, R8, n and m are as defined in the specification.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: September 25, 2007
    Assignee: ILFORD Imaging Switzerland GmbH
    Inventors: Jean-Luc Gremaud, Arnd Kriebel
  • Ink set for ink jet printing
    Patent number: 7264663
    Abstract: Ink set for ink jet printing consisting of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the magenta ink contains, as first dye component, at least one dye of formula (I) wherein R2 and Aryl are as defined in the specification, or of formula (II) wherein M, R1 and Aryl are as defined in the specification and, as second dye component, at least one copper complex azo dye of formula (III) or of formula (IV) wherein M, R1, R2, R3, R4, R5, R6 and R7 are as defined in the specification.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: September 4, 2007
    Assignee: Ilford Imaging Switzerland GmbH
    Inventors: Jean-Luc Gremaud, Arnd Kriebel
  • Ink set for ink jet printing
    Publication number: 20050211134
    Abstract: Ink set for ink jet printing consisting of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the magenta ink contains, as first dye component, at least one dye of formula (I) wherein R2 and Aryl are as defined in the specification, or of formula (11) wherein M, R1 and Aryl are as defined in the specification and, as second dye component, at least one copper complex azo dye of formula (111) or of formual (IV) wherein M, R1, R2, R3, R4, R5, R6, R7 are as defined in the specification.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 29, 2005
    Inventors: Jean-Luc Gremaud, Arnd Kriebel
  • Ink set for ink jet printing
    Publication number: 20050160937
    Abstract: Ink set for ink jet printing comprised of at least one yellow ink, one magenta ink, one cyan ink and one black ink, wherein the yellow ink contains a mixture of at least one yellow dye with reddish hue of formula (I), wherein R, M, R17, R18, p4, n and m are as defined in the specification and at least one yellow dye with greenish hue of formula (II), wherein R, M, R6, R7, R8, n and m are as defined in the specification.
    Type: Application
    Filed: January 27, 2005
    Publication date: July 28, 2005
    Inventors: Jean-Luc Gremaud, Arnd Kriebel
  • Process for the preparation of photographic direct-positive emulsions
    Patent number: 4704349
    Abstract: Photographic direct-positive emulsions with silver halide crystals of layered structure are prepared.The silver halide crystals of these emulsions can form a latent internal image and are superficially converted to silver iodide. Normal surface developers are suitable for developing.
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: November 3, 1987
    Assignee: Ciba-Geigy AG
    Inventor: Arnd Kriebel