Patents by Inventor Wilfred A. Pabst

Wilfred A. Pabst 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).

  • Minimizing soluble iron concentration in a plant effluent
    Patent number: 4221766
    Abstract: This process reduces the soluble iron found in the final effluent of a plant making iron oxide by the Penniman-Zoph scrap process. The finished oxide product slurry is separated from the scrap iron, and the slurry is aerated while the pH is maintained between about 3.0 and 5.0. As the soluble iron is converted to product oxide, the pH of the system rises toward the higher value.
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: September 9, 1980
    Assignee: Cities Service Company
    Inventors: Wilfred A. Pabst, David Crabbe