Patents by Inventor David L. DeGroot

David L. DeGroot 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).

  • Control system for controlling a pulp washing system using a neural network controller
    Patent number: 5282131
    Abstract: A control system for a countercurrent pulp washing process in which the pulp is formed as a pulp mat on at least one moving filter surface and the mat is supplied with rinse water to replace water in the pulp mat thereby reducing the soda loss in the mat before it is removed from the filter surface. The process is characterized by at least one predictable process variable including dissolved solids retained in the pulp mat. The system comprises a trainable neural network having a plurality of input neurons having input values applied thereto and output neurons for providing output values and means for training the neural network to provide predicted values for the predictable process variables.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: January 25, 1994
    Assignee: Brown and Root Industrial Services, Inc.
    Inventors: John B. Rudd, David L. DeGroot