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Class Information
Number: 210/DIG.9
Name: Liquid purification or separation > Floating cover

Patents under this class:

Patent Number Title Of Patent Date Issued
RE41442 Insulated removable pond cover Jul. 20, 2010
7005068 Method and apparatus for treating animal waste and wastewater Feb. 28, 2006
6514410 Odor control apparatus for facultative lagoon Feb. 4, 2003
6451206 System for converting organic waste reservoirs onto anaerobic digesters Sep. 17, 2002
5562759 Gas collection system for anaerobic ponds Oct. 8, 1996
5525216 Floating inlet tube Jun. 11, 1996
5453179 Sludge clarifier roof with central column support Sep. 26, 1995
5423895 Sludge digesters with separate liquid chambers to buoy ballast members Jun. 13, 1995
5384033 Floating inlet tube Jan. 24, 1995
5338452 High rate anaerobic reactor for primary treatment of high strength wastewater Aug. 16, 1994
5281341 Sludge treatment process Jan. 25, 1994
5238844 Sludge digester Aug. 24, 1993
5092482 Sludge digesters with separate liquid chambers to buoy ballast members Mar. 3, 1992
4790447 Modification to floating roof tank design Dec. 13, 1988
4710292 Digester tank with foam control cover Dec. 1, 1987
4648968 Floating cover tank with guides for vertical displacement of the cover Mar. 10, 1987
4437987 Anaerobic digester gas collection and storage systems Mar. 20, 1984
4436818 Apparatus for carrying out an anaerobic fermentation of organic solid matter for the purpose of extracting a combustible gas Mar. 13, 1984
4391705 Ballasting digestor covers Jul. 5, 1983
4378437 Digester apparatus Mar. 29, 1983
4349355 Methane generator Sep. 14, 1982
4256837 Gas collection apparatus Mar. 17, 1981
4230580 Slurry digester and capping arrangement for use therein Oct. 28, 1980
4166835 Organic digester apparatus Sep. 4, 1979

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