Patents by Inventor Eileen Mason

Eileen Mason 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 addition of powders to photographic systems
    Patent number: 5180651
    Abstract: A process for improving the method by which a powder such as a dye is added to a gelatino silver halide element is described. This process involves encapsulating the powder within a gelatin capsule. This process avoids cross-contamination and dusting when powder is added to solvent and also reduces the use of extra solvent in the manufacture of the element.
    Type: Grant
    Filed: May 1, 1991
    Date of Patent: January 19, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Eileen Mason