Patents by Inventor Harry H. Wardell

Harry H. Wardell 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).

  • Waste water clarification
    Patent number: 4882070
    Abstract: A process for increasing the efficiency of a primary clarifier in raw waste water clarification by reducing biological oxygen demand and suspended solids by the sequential addition upstream of the primary clarifier of: (1) a salt of a water soluble bi- or tri-valent metal and compositions or mixtures thereof, (2) fly-ash, and (3) a cationic surface active polymer composition comprising a branched, high cationic charge density containing and water soluble polymeric polyether amine solution at the primary clarifier and recovering the clarified effluent from the primary clarifier.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: November 21, 1989
    Assignee: Dellchem, Inc.
    Inventor: Harry H. Wardell
  • Waste water clarification
    Patent number: 4761239
    Abstract: A process for increasing the efficiency of a primary clarifier in raw waste water clarification by reducing biological oxygen demand and suspended solids by the sequential addition upstream of the primary clarifier of: (1) a salt of a water soluble bi- or tri-valent metal and compositions or mixtures thereof, (2) fly-ash, and (3) a cationic surface active polymer composition comprising a branched, high cationic charge density containing and water soluble polymeric polyether amine solution at the primary clarifier and recovering the clarified effluent from the primary clarifier.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: August 2, 1988
    Inventor: Harry H. Wardell