Patents by Inventor Norman R. Westfall

Norman R. Westfall 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).

  • Fluid resistor
    Patent number: 4275767
    Abstract: A fluid resistor with a fluid tight structure including two planar members having a surface of each contacting in close proximity. One of the planar members has a laminated structure including a substrate and at least one thin layer of substantially uniform thickness formed on the substrate. A groove extends through the layer. The groove and the surface of the other planar member define a capilliary passageway of substantially constant depth for restricted fluid flow.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: June 30, 1981
    Assignee: Sybron Corporation
    Inventor: Norman R. Westfall