Patents by Inventor Kimberly A. Bell

Kimberly A. Bell 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).

  • Methods for sludge dewatering
    Patent number: 5720887
    Abstract: The present invention provides a method for dewatering sludge that utilizes the step-wise and sequential addition to the sludge of a cationic polyamine and a cationic polyacrylamide.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: February 24, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Stephen R. Vasconcellos, Michael R. Wood, Kimberly A. Bell