Patents by Inventor Keith T. Van Scotter

Keith T. Van Scotter 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).

  • Drum washer having liquid collecting means
    Patent number: 5021126
    Abstract: In a drum washer for washing the pulp for making paper to remove pulping liquors, the method and apparatus for providing the filtrate liquid being drained from the drum and pulp mat during a portion of the rotation cut-off which liquid can be continuously sampled and analyzed to give a more positive indication of washing efficiency.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: June 4, 1991
    Assignee: Union Camp Corporation
    Inventors: Dennis L. Gwin, Keith T. Van Scotter, Ron L. Montgomery
  • Reducing chemical transfer between treatment stages
    Patent number: 4310384
    Abstract: A method and apparatus for reducing or eliminating the transfer of chemicals across a washer when reusing washer filtrate as a washing medium in a counterflow system. The flow of washing fluid on the washers before and after a treatment stage is split and the liquid in the pulp mat leaving the washer is principally the type used to treat the pulp after the washer, and the filtrate from the washer is principally the type used to treat the pulp before the washer.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: January 12, 1982
    Assignee: Weyerhaeuser Company
    Inventors: Michael D. Meredith, Louis L. Edwards, Jr., Keith T. Van Scotter