Patents by Inventor Roger L. Lok

Roger L. Lok 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).

  • Silver halide photographic elements with reduced fog
    Patent number: 5968724
    Abstract: This invention relates to silver halide photographic element comprising a silver halide emulsion chemically sensitized in the presence of an isothiazolin-one compound represented by the formula ##STR1## wherein R.sup.1 is a substituent; and Z is a substituted or unsubstituted saturated ring, wherein the isothiazolin-one compound was added after precipitation of the emulsion.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: October 19, 1999
    Assignee: Eastman Kodak Company
    Inventors: Jon N. Eikenberry, Roger L. Klaus, Roger L. Lok, Jerzy Z. Mydlarz, Brian S. White