Patents by Inventor Dennis Wetherley

Dennis Wetherley 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).

  • Patent number: 4277253
    Abstract: The preparation of dry, stable granular material from water-soluble potassium and ammonium salts and a mixture thereof by subjecting a dispersion of crystals of the salt in an aqueous liquid to the action of a granulating device in the presence of calcium sulphate hemihydrate and a hydrophilic surface active agent to effect agglomeration of said crystals, and thereafter subjecting the agglomerated crystals to a drying operation.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: July 7, 1981
    Assignee: Adelaide & Wallaroo Fertilizers Ltd.
    Inventors: Karl H. Walter, John D. Johnston, Dennis Wetherley