Patents by Inventor Kenneth Ray Watkins

Kenneth Ray Watkins 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).

  • Fortified gypsum granule
    Patent number: 4015972
    Abstract: A sulfur fortified gypsum granule is provided, preferably adapted for agricultural uses so as to give a timed release of sulfate nutrients in soil comprising a combination of at least about 5 percent by weight of elemental sulfur and a major proportion of calcium sulfate which combination has been roll pressure compacted at a mixture temperature of about 110.degree.-230.degree. F to form hard granular shapes.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: April 5, 1977
    Assignee: United States Gypsum Company
    Inventors: Kenneth Ray Watkins, Robert John Wenk