Patents by Inventor James P. Terwilliger

James P. Terwilliger 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).

  • Process for preparing silver halide emulsion using a sulfur-containing ripening agent
    Patent number: 4046576
    Abstract: A process is disclosed for the continuous formation of radiation-sensitive silver halide emulsions. In the course of reacting a silver salt with a halide salt in the presence of a peptizer to form a radiation-sensitive silver halide emulsion a portion of the emulsion is withdrawn continuously from the reaction chamber while silver halide grain formation is occurring. The silver halide grains are formed in the presence of a sulfur-containing silver halide ripening agent, while the total halide ion concentration is concurrently controlled and maintained at less than 0.01 molar.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: September 6, 1977
    Assignee: Eastman Kodak Company
    Inventors: James P. Terwilliger, Anthony D. Gingello, Jong-Shinn Wey