Patents by Inventor Stephen M. Popham

Stephen M. Popham 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).

  • Process for removing nitrites from a silver nitrate solution
    Patent number: 5364500
    Abstract: A silver nitrate feed solution containing nitrites and nitric acid is treated to produce a low-nitrite silver nitrate product solution. In the process, the temperature of the feed solution is established in the range of from about 80.degree. C. to about the boiling point of the feed solution. The feed solution is introduced into a vessel having a stripping zone containing a contacting element and is dispersed over the contacting element. The feed solution is flowed counter to and intimately contacted in the stripping zone with a motive gas to strip nitrites from solution and form a low-nitrite silver nitrate product solution.
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: November 15, 1994
    Assignee: Eastman Kodak Company
    Inventors: Patrick M. Chefalo, Andrius A. Naujokas, Stephen M. Popham, Gary M. DiStefano, Robert J. Buesing