Patents by Inventor John L. Medbery

John L. Medbery 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).

  • Granulated fertilizer and slurry process therefor
    Patent number: 4528021
    Abstract: A continuous process for the production of a granulated fertilizer wherein comminuted phosphate rock, phosphoric acid and water are introduced into a pre-reactor where they are heated. The mixture is continuously withdrawn and transferred to a digester where heating is continued resulting in formation of a slurry. The slurry is continuously withdrawn and is split into two streams, one of which is recycled to either the pre-reactor or to the digester while the other stream is delivered to a granulator where it is mixed with other fertilizer ingredients and dried to form the granulated fertilizer.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: July 9, 1985
    Assignee: International Minerals & Chemical Corp.
    Inventor: John L. Medbery