Patents by Inventor John Stringer Hewitt

John Stringer Hewitt 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).

  • Measurement of slurry consistencies
    Patent number: 4057729
    Abstract: Consistencies of aqueous slurries, such as cellulose slurries, are measured by immersing in the slurry a radioactive source of fast neutrons, and neutron detector at a fixed, predetermined distance from the source. The neutron count so obtained can be used to determine slurry consistency. If a second neutron detector is immersed in the slurry at a predetermined, greater distance from the neutron source, the two neutron counts can be used to determine both the slurry consistency and the density of the suspended material.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: November 8, 1977
    Inventor: John Stringer Hewitt