Patents by Inventor Ralph T. Ferrell

Ralph T. Ferrell 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).

  • Calcining method for alumina
    Patent number: 3979504
    Abstract: Alumina having improved color characteristics and improved extrusion properties is produced by an improvement in the process for producing low-density, high-porosity, high-surface area alumina from an aqueous alumina slurry by contacting said aqueous alumina slurry with an effective amount of an organic solvent to form a solvent-aqueous alumina mixture; drying said mixture and recovering said low-density, high-porosity, high-surface area alumina, comprising drying said solvent-aqueous alumina mixture in an inert atmosphere.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: September 7, 1976
    Assignee: Continental Oil Company
    Inventors: William C. Ziegenhain, David V. Porchey, Ralph T. Ferrell