Patents by Inventor Walter E. Pittman

Walter E. Pittman 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).

  • Control apparatus for silver halide emulsion making
    Patent number: 4026668
    Abstract: The disclosure relates to a control apparatus for the preparation of silver halide emulsions in which the flow rates of the reactants can be controlled to provide a desired pAg in the precipitation vessel. Several embodiments are used, depending upon the desired accuracy of pAg. The pAg and flow rate can also be caused to follow programs to maintain constant, or to vary, the pAg during a particular emulsion making process.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: May 31, 1977
    Assignee: Eastman Kodak Company
    Inventors: Gerald J. Culhane, Gary R. Layton, Walter E. Pittman