Patents by Inventor Michael D. Zeldes

Michael D. Zeldes 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).

  • Coating process employs surfactants
    Patent number: 4508764
    Abstract: Incorporation of a fluorocarbon and a hydrocarbon surfactant in a photographic silver halide emulsion for high speed slide flow coating increases coating latitude by reducing a disruptive standing wave and allowing broader vacuum pressure ranges. The increased coating latitude is particularly advantageous at coating speeds above 100 meters per minute when the emulsion contains from 0.02 to 2 g of fluorocarbon surfactant per 1.5 moles of silver halide.
    Type: Grant
    Filed: December 14, 1982
    Date of Patent: April 2, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Michael D. Zeldes