Patents by Inventor Eric Kelder

Eric Kelder 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).

  • Filtration of wet process superphosphoric acid
    Patent number: 4547295
    Abstract: Filtration of wet process superphosphoric acid by vacuum filtration is greatly enhanced by the use of a filter aid having a statistically selected distribution of particle sizes.
    Type: Grant
    Filed: December 7, 1983
    Date of Patent: October 15, 1985
    Assignee: Texasgulf Inc.
    Inventors: Jesse M. Carr, Jr., Raymond E. Sheler, Frank J. Richards, Eric Kelder