Patents by Inventor John Paul Smitherman

John Paul Smitherman 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).

  • Laminar flow meter or controller
    Patent number: 7178409
    Abstract: Volumetric flow meters, volumetric flow controllers, mass flow meters, and mass flow controllers using a transverse laminar flow assembly are described. The flow assembly may be constructed from a plurality of open and/or closed slices or layers stacked upon one another and held together in compression by through bolts or another means. Meter or flow controller accuracy may be aided by use of flow conditioning features preceding an axial bore of the transverse flow assembly including one or more of a deflector, filter and nozzle.
    Type: Grant
    Filed: October 25, 2004
    Date of Patent: February 20, 2007
    Assignee: Sierra Instruments, Inc.
    Inventors: John George Olin, John Paul Smitherman