Patents by Inventor Darrell J. Spires

Darrell J. Spires 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).

  • Apparatus for mixing materials such as fertilizer components
    Patent number: 4350444
    Abstract: An apparatus for mixing materials is disclosed. The apparatus includes a hopper, a substantially vertical auger within the hopper, and a housing enclosing the auger to define a mixing chamber. A baffle, attached to the housing, and the sidewall of the hopper are oriented so as to cooperatively provide a blending flow pattern within the hopper, thereby further mixing the materials.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: September 21, 1982
    Assignees: Lloyd A. Yargus, Larry D. Yargus
    Inventors: Lloyd A. Yargus, Lester W. Switzer, Sr., Gary N. Allen, Gary S. Elliott, Larry D. Yargus, William D. Lowry, Jeffrey M. Gosnell, Darrell J. Spires