Patents by Inventor Ivan R. Maw

Ivan R. Maw 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).

  • Method for the preparation of a photothermographic system
    Patent number: 4161408
    Abstract: A process of forming photothermographic emulsions which comprises adding silver halide with agitation to a dispersion of melted long chain fatty acid in water in the absence of alkali and ammonia salts of said acid, then converting the acid to an ammonia salt or alkali metal salt, then cooling the dispersion, and thereafter converting the alkali metal salt or ammonia salt to a silver salt of the acid.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: July 17, 1979
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John M. Winslow, Ivan R. Maw