Patents by Inventor David L. Fry

David L. Fry 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).

  • APPARATUS AND METHOD FOR DE-WATERING OF FLOCCULATED MATERIALS
    Publication number: 20130186821
    Abstract: An apparatus (1) for de-watering flocculated material, the apparatus comprising a vessel (2) having a first volume and a second volume (7) being separated by a filter means (12), the filter means (12) being configured to allow water to pass through and to retain solids. The first volume (6) being for receiving flocculated material. The apparatus also comprises pressure application means (13) configured, in use, to apply a reduced pressure from a location in the first volume (6) spaced from the filter means (12), the pressure application means (13) being provided with a fluid connection for removal of water from the location in the first volume.
    Type: Application
    Filed: March 4, 2011
    Publication date: July 25, 2013
    Applicant: GENESIS FLUID SOLUTIONS, LTD
    Inventors: Michael K. Hodges, Larry D. Campbell, David L. Fry
  • Process for reducing sulphate ion concentration in aqueous sodium hydroxide solutions
    Patent number: 4565612
    Abstract: A process is disclosed for reducing sulphate ion concentration in an aqueous solution comprising sodium hydroxide. The process comprises adding sodium carbonate or bicarbonate to said aqueous solution to form an insoluble sodium carbonate-sodium sulphate double salt, removing said insoluble salt, and recovering a purified aqueous sodium hydroxide solution.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: January 21, 1986
    Assignee: The Dow Chemical Company
    Inventor: David L. Fry