Patents by Inventor Rory R. Hughes

Rory R. Hughes 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).

  • Urea-formaldehyde granular fertilizer
    Patent number: 4280830
    Abstract: A free-flowing granular fertilizer composition and a process for its preparation in which the granules comprise expanded, substantially oil-free coffee grounds as a carrier coated and impregnated with a urea-formaldehyde condensation product. The condensation product has from 1 to 3 moles of urea for each mole of formaldehyde and the composition has at least 15% of the total nitrogen in cold water insoluble form.
    Type: Grant
    Filed: January 23, 1980
    Date of Patent: July 28, 1981
    Assignee: O. M. Scott and Sons Company
    Inventors: Fred E. Ferguson, Rory R. Hughes, Kenneth E. Fersch