Patents by Inventor Ibrahim Zidan

Ibrahim Zidan 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).

  • Pigment combinations for inks for the intaglio printing of illustrations, having improved rheological properties
    Patent number: 6110267
    Abstract: An intaglio ink for printing illustrations comprises C.I. Pigment Yellow 139 and further, preferably chlorine-free organic yellow pigments and has good rheological and coloristic properties which are comparable with those of conventional intaglio printing inks based on C.I. Pigment Yellow 12.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: August 29, 2000
    Assignee: Clariant GmbH
    Inventors: Rainer Winter, Ibrahim Zidan, Ulrich Ott, Alexander Sieber