Patents by Inventor L. Frederick Roensch

L. Frederick Roensch 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 for prevention of well fouling
    Patent number: 5069286
    Abstract: This invention relates to a method for stabilizing and maintaining water wells penetrating a subterranean formation for the production of water which comprises adding to the wells at least one anionic polymeric sequesterant derived from a carboxylic acid and then subsequently treating the well water with a small but effective amount of at least one biocide.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: December 3, 1991
    Assignee: The Mogul Corporation
    Inventors: L. Frederick Roensch, Kelvin Y. Chang, Clarence T. Tanner