Patents by Inventor Rainer Bialek

Rainer Bialek 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).

  • Polymeric magenta coupler and color photographic recording material that contains this polymeric magenta coupler
    Patent number: 5354826
    Abstract: Polymeric color couplers with repeating units of a polymerized monomer K of formula I ##STR1## with R.sup.1 H or an optionally substituted alkyl group;R.sup.2, R.sup.3, R.sup.4 (identical or different) H, Cl, --COOH or optionally substituted alkyl groups; andX H or a group releaseable by coupling provide, during chromogenic development: magenta dye images with high dye yield and advantageous absorption level.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: October 11, 1994
    Assignee: Agfa-Gevaert AG
    Inventors: Gunter Helling, Rainer Bialek, Ralf Weimann