Patents by Inventor Paul V. Biermans

Paul V. Biermans 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 and apparatus suitable for the preparation of AgX-emulsions
    Patent number: 4171224
    Abstract: A photosensitive silver halide emulsion is prepared by circulating separate streams of circulating peptizer solution with at least one power operated pump through separate mixing zones in which one stream is mixed with a solution of a silver salt and the other is mixed with a solution a halide salt, and these streams are then combined and mixed in a reaction zone so that silver halide crystals are formed by reaction between silver salt and halide salt and the circulating peptizer solution contains increasing amounts of silver halide crystals in course of time, such circulation being continued until a silver halide emulsion of a predetermined concentration has been formed.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: October 16, 1979
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Karel E. Verhille, Paul V. Biermans, Roland Van Keilegom