Patents by Inventor Calvin Briggs Rountree

Calvin Briggs Rountree 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).

  • Slit impact air sampler
    Patent number: 3972226
    Abstract: A slit impact air sampler for collecting viable organisms in air borne particles at a controlled rate. The rotating platform upon which a collecting plate is positioned can be rotated at ten different speeds through a variable speed transmission. The height of the slit above the collecting plate can be adjusted while maintaining the slit in a radial position to the plate.
    Type: Grant
    Filed: August 12, 1975
    Date of Patent: August 3, 1976
    Inventors: Calvin Briggs Rountree, Donovan Charles Philpin Mitchell