Patents by Inventor Raymond F. Drnevich

Raymond F. Drnevich 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).

  • Purge gas conditioning of high intensity ionization system for particle removal
    Patent number: 4239505
    Abstract: Back corona is controlled in high intensity ionization system for electrostatic charging of particles in gas stream by controlling purge gas flow and relative saturation content thereof.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: December 16, 1980
    Assignee: Union Carbide Corporation
    Inventor: Raymond F. Drnevich
  • Heavy metal removal from wastewater sludge
    Patent number: 4193854
    Abstract: Insoluble heavy metal sulfides in activated sludge are converted by biochemical oxidation to soluble sulfates, followed by deposition of metals on cathode from sludge as electrolytic bath.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: March 18, 1980
    Assignee: Union Carbide Corporation
    Inventors: Raymond F. Drnevich, Ladislas C. Matsch, Embar G. Srinath
  • Phosphate removal from wastewater
    Patent number: 4183808
    Abstract: In activated sludge-type wastewater treatment in which phosphate is taken up in the aeration zone, solids are concentrated in a separate zone to form phosphate-enriched sludge and phosphate is resolubilized in an anoxic zone, a major part of the latter is returned to aeration without intervening phosphate removal and phosphate wasting is solely from sludge.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: January 15, 1980
    Assignee: Union Carbide Corporation
    Inventor: Raymond F. Drnevich
  • Apparatus for degassing floating sludge
    Patent number: 4175041
    Abstract: Apparatus for degassing floating solids containing entrapped gas in an open-topped liquid-solid settling chamber wherein floating solids tend to accumulate at the surface of liquid being separated from solids. Liquid containing floating solids is gently agitated in a trough enclosure for degassing of same to form liquid containing degassed solids, and the latter is discharged from the trough disclosure into the liquid-solid settling chamber.
    Type: Grant
    Filed: October 5, 1977
    Date of Patent: November 20, 1979
    Assignee: Union Carbide Corporation
    Inventors: Raymond F. Drnevich, Kallidaikurichi N. Venkataraman, Thomas E. Walder
  • Nitrification-denitrification of wastewater
    Patent number: 4173531
    Abstract: In activated sludge-type wastewater treatment, nitrified oxygenated liquid-solid from the oxic zone is retained under anoxic conditions for denitrification and release of nitrogen gas, and the denitrified liquid-solid returned to the oxic zone.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: November 6, 1979
    Assignee: Union Carbide Corporation
    Inventors: Ladislas C. Matsch, Raymond F. Drnevich