Patents by Inventor David E. Staples

David E. Staples 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).

  • High nitrogen dried poultry manure fertilizer
    Patent number: 5730772
    Abstract: A method of preparing a dried fertilizer composition from poultry manure, minimizing decomposition and degradation of organic nitrogen, to achieve a total nitrogen content of about 3 to about 7 percent by weight.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: March 24, 1998
    Assignee: Creekwood Farms Incorporated
    Inventor: David E. Staples