Patents by Inventor David K. Kennedy

David K. Kennedy 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).

  • Removal of aluminum and sulfate ions from aqueous solutions
    Patent number: 5338457
    Abstract: A process for removing aluminum and sulfate values from an aqueous solution containing the same which comprises passing the solution through a semi-permeable membrane in a pressure vessel. The permeate solution is depleted of aluminum and sulfate ions and the concentrate solution is concentrated in aluminum and sulfate ions. The concentrate solution can be re-used in alum manufacture and the permeate solution can be discharged into public waterways without further purification.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: August 16, 1994
    Assignee: General Chemical Corporation
    Inventors: John Capozzola, David K. Kennedy
  • Apparatus and method for slurrying soda ash
    Patent number: 4538921
    Abstract: This invention relates to an improved soda ash slurrying device, which includes liquid and soda ash particle passages and separating means positioned between the interior openings of these passages to prevent contact between water or aqueous sodium carbonate solution and soda ash particles prior to their exiting the openings of the passages.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: September 3, 1985
    Assignee: Allied Corporation
    Inventor: David K. Kennedy