• Inventors:
  • Assignees:
  • Publication Date: December 31, 1969
  • Publication Number:





    Download Full PDF Version (Non-Commercial Use)

    Patent Citations (0)

      Publication numberPublication dateAssigneeTitle

    NO-Patent Citations (0)


    Cited By (12)

      Publication numberPublication dateAssigneeTitle
      DE-4302740-A1August 04, 1994Werner TrappVerfahren und Vorrichtung zur umweltverträglichen Entsorgung von biologischem Abfall, insbesondere Problemabfall
      US-2009100787-A1April 23, 2009Olympus Technologies, Inc.Systems and Methods for Ballasting Covers for Gas-Holding Sludge Digestors
      US-4648968-AMarch 10, 1987Chicago Bridge & Iron CompanyFloating cover tank with guides for vertical displacement of the cover
      US-4710292-ADecember 01, 1987Atara CorporationDigester tank with foam control cover
      US-5092482-AMarch 03, 1992Envirotech CorporationSludge digesters with separate liquid chambers to buoy ballast members
      US-5147418-ASeptember 15, 1992Chicago Bridge & Iron Technical Services CompanyVolatile liquid storage system
      US-5238844-AAugust 24, 1993Baker Hughes IncorporatedSludge digester
      US-5384033-AJanuary 24, 1995Baker Hughes IncorporatedFloating inlet tube
      US-5423895-AJune 13, 1995Baker Hughes IncorporatedSludge digesters with separate liquid chambers to buoy ballast members
      US-6247278-B1June 19, 2001Thomas A. RysgaardSewage digester cap
      US-8281543-B2October 09, 2012Olympus Technologies, Inc.Systems and methods for ballasting covers for gas-holding sludge digestors
      US-9878930-B1January 30, 2018Westech Engineering, Inc.Systems and methods for installing digester ballast