Patents Represented by Attorney Thomas F. Kirkchoff

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  • Photographic element containing a macrocyclic ether compound
    Patent number: 4782013
    Abstract: This invention is directed to a photographic element containing a radiation-sensitive silver halide emulsion layer and a macrocyclic thia or selena ether compound which also comprises oxygen atoms. These macrocyclic compounds are improved silver halide ripening agents.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: November 1, 1988
    Assignee: Eastman Kodak Company
    Inventors: Arthur H. Herz, Roger L. Klaus