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Oil separator
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Patent number 7,083,736
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Issue date Aug 1, 2006
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Gene Hirs
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Vacuum fluid filter
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Patent number 6,358,406
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Issue date Mar 19, 2002
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Deep bed filtration system
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Patent number 6,319,400
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Issue date Nov 20, 2001
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Gene Hirs
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Method of oil separation
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Patent number 6,200,490
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Issue date Mar 13, 2001
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Oil seperator
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Patent number 5,989,415
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Issue date Nov 23, 1999
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Oil extraction system
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Patent number 5,795,478
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Issue date Aug 18, 1998
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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-
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Rotating drum filter
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Patent number 5,139,670
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Issue date Aug 18, 1992
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Drum filter
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Patent number 5,112,485
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Issue date May 12, 1992
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Bar screen filter
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Patent number 4,826,589
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Issue date May 2, 1989
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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-
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Granular filter medium
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Patent number 4,326,964
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Issue date Apr 27, 1982
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Pressure filter
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Patent number 4,274,961
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Issue date Jun 23, 1981
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Traveling belt filter
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Patent number 4,242,205
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Issue date Dec 30, 1980
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter method and apparatus
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Patent number 4,230,572
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Issue date Oct 28, 1980
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Deep bed filter
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Patent number 4,197,205
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Issue date Apr 8, 1980
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Filter method
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Patent number 4,190,533
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Issue date Feb 26, 1980
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AMSTED Industries Incorporated
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Gene Hirs
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C07 - ORGANIC CHEMISTRY
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-
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Method of filtering oil from liquids
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Patent number 3,992,291
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Issue date Nov 16, 1976
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Hydromation Filter Company
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Gene Hirs
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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