Patents by Inventor James T. Stafford

James T. Stafford 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).

  • Granular coated particles containing urea and metal nitrate, and process for making the same
    Patent number: 5938813
    Abstract: Granular coated particles suitable for use alone or in combination with other fertilizer particles as an nitrogen-dispersing agricultural fertilizer, and a process for making the granular coated particles are disclosed. The granular coated particles include particles formed from at least one metal nitrate, and a first coating layer surrounding each of the metal nitrate particles. The first coating layer is formed from a mixture containing urea and at least one metal nitrate. The metal nitrate particles each is substantially free and discrete from other metal nitrate particles. The metal nitrate is preferably sodium nitrate or potassium nitrate.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: August 17, 1999
    Assignee: SQM Nitratos, S.A.
    Inventors: Patricio L. Araya, Armin R. Lauterbach, Jubitza K. Reyes, A. Michael Huey, James T. Stafford, Darren L. Jeffreys, A. Ray Shirley, Jr.