Patents by Inventor Roland Kurzen

Roland Kurzen 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).

  • Patent number: 5916673
    Abstract: A recording sheet for ink jet printing comprising a support having coated onto said support one or more layers receptive for aqueous inks, said coating comprising at least one film forming, hydrophilic polymer or a mixture of film forming hydrophilic polymers and imbedded in this film at least one trivalent salt of a metal of the Group IIIb series of the periodic table of elements or complexes which comprise trivalent ions of the metals of Group IIIb of the periodic table of the elements. In another embodiment the salts or complexes of Group IIIb elements are coated directly on the substrate surface without the presence of the film forming polymer.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: June 29, 1999
    Assignee: Ilford AG
    Inventors: Mario Fryberg, Roland Kurzen, Klaus Haarmann, Diane L. Blednick, Daniel R. Rogers
  • Patent number: 4357280
    Abstract: A method of processing photographic silver dye bleach materials which have been exposed imagewise is provided. The process steps are (1) silver developing, (2) dye bleaching, (3) silver bleaching and (4) fixing. The treatment baths for the process steps (2), (3) and (4), or the combined treatment baths useful for process step (3) with at least one the process steps (2) or (4) contain water-soluble tertiary phosphines as silver ligands. These phosphines effect an acceleration of the dye and silver bleaching and they are further suitable stabilizers and optionally antioxidants which yield stable treatment baths.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: November 2, 1982
    Assignee: Ciba-Geigy AG
    Inventors: Christoph Chylewski, Gerald Jan, Roland Kurzen, Max Meier, Matthias Schellenberg
  • Patent number: 4138256
    Abstract: A method of processing photographic silver dye bleach materials which have been exposed imagewise is provided. The process steps are (1) silver developing, (2) dye bleaching, (3) silver bleaching and (4) fixing. The treatment baths for the process steps (2), (3) and (4), or the combined treatment baths useful for process step (3) with at least one the process steps (2) or (4) contain water-soluble tertiary phosphines as silver ligands. These phosphines effect an acceleration of the dye and silver bleaching and they are further suitable stabilizers and optionally antioxidants which yield stable treatment baths.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: February 6, 1979
    Assignee: Ciba-Geigy AG
    Inventors: Christoph Chylewski, Gerald Jan, Roland Kurzen, Max Meier, Matthias Schellenberg