Patents by Inventor Angelika Scholkmann

Angelika Scholkmann 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).

  • Bleach-fixing bath for color photographic material
    Patent number: 5976772
    Abstract: A bleach/fixing bath, characterized in that it contains, apart from the active and auxiliary substances necessary for bleach/fixing, a phosphonocarboxylic acid having at least two carboxylic acid groups per molecule, is lower in odor and more stable than conventional bleaching baths.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 2, 1999
    Assignee: Agfa Gevaert AG
    Inventors: Thomas Hubsch, Ralf Weimann, Angelika Scholkmann, Erika Spriewald