Assignee
PASSAVANT WERKE
DE·48 granted patents·794 citations·filing 1972–1995
Top patents by PatentIndex Score
48 records- 0195US4388195AProcess and apparatus for the chemical-mechanical treatment and purification of ground waters, surface waters and effluentsPASSAVANT WERKE·Filed 1979·Granted Jun 14, 1983·137 cites·18 claims
- 0288US4142970AMethod and apparatus for mechanically and chemically treating liquidsPASSAVANT WERKE·Filed 1972·Granted Mar 6, 1979·54 cites·26 claims
- 0384US4290898AMethod and apparatus for mechanically and chemically treating liquidsPASSAVANT WERKE·Filed 1980·Granted Sep 22, 1981·49 cites·26 claims
- 0479US4076033ASpraying apparatus for cleaning filter press platesPASSAVANT WERKE·Filed 1976·Granted Feb 28, 1978·34 cites·13 claims
- 0573US4486307AFilter apparatus having filter bed back-washing meansPASSAVANT WERKE·Filed 1982·Granted Dec 4, 1984·33 cites·8 claims
- 0670US4368125AApparatus for extracting liquid from a suspensionPASSAVANT WERKE·Filed 1981·Granted Jan 11, 1983·29 cites·11 claims
- 0767US5338445AModule for a reactor for anaerobic waste water treatmentPASSAVANT WERKE·Filed 1993·Granted Aug 16, 1994·20 cites·9 claims
- 0867US4396511ACleaning apparatus for curved filter screensPASSAVANT WERKE·Filed 1980·Granted Aug 2, 1983·19 cites·16 claims
- 0964US5366622AProcedure and installation for conditioning and subsequent dewatering of sludgePASSAVANT WERKE·Filed 1991·Granted Nov 22, 1994·39 cites·14 claims
- 1064US5037559AProcess for conditioning and dewatering sludgesPASSAVANT WERKE·Filed 1989·Granted Aug 6, 1991·33 cites·7 claims
- 1162US4013374ACover for manhole structuresPASSAVANT WERKE·Filed 1975·Granted Mar 22, 1977·22 cites·7 claims
- 1260US4405457APlate-type filter press with a cleaning truckPASSAVANT WERKE·Filed 1981·Granted Sep 20, 1983·19 cites·8 claims
- 1359US5695646AProcess for conditioning soft water to become drinking waterPASSAVANT WERKE·Filed 1995·Granted Dec 9, 1997·24 cites·3 claims
- 1459US5190672AMethod for thermal disposal of sewage sludgePASSAVANT WERKE·Filed 1991·Granted Mar 2, 1993·21 cites·12 claims
- 1551US5075012AProcess for dewatering sludges in filter pressesPASSAVANT WERKE·Filed 1990·Granted Dec 24, 1991·16 cites·13 claims
- 1649US5500118ABiogas reactor for the anaerobic treatment of waste waterPASSAVANT WERKE·Filed 1994·Granted Mar 19, 1996·15 cites·9 claims
- 1749US4305426AApparatus for continuous constant discharge of liquid from a containerPASSAVANT WERKE·Filed 1979·Granted Dec 15, 1981·18 cites·9 claims
- 1848US4842745AProcess for separating organic compounds from water by extractionPASSAVANT WERKE·Filed 1987·Granted Jun 27, 1989·19 cites·17 claims
- 1946US4209395AProcess for slow softening waterPASSAVANT WERKE·Filed 1978·Granted Jun 24, 1980·13 cites·2 claims
- 2046US4040952ATraveling band screenPASSAVANT WERKE·Filed 1975·Granted Aug 9, 1977·13 cites·7 claims
- 2145US4392952ABar screen with screen cleaner for waste water treatment installationsPASSAVANT WERKE·Filed 1981·Granted Jul 12, 1983·11 cites·4 claims
- 2243US4587015APlate filter pressPASSAVANT WERKE·Filed 1984·Granted May 6, 1986·9 cites·5 claims
- 2341US4427554AMethod for applying a secondary filter layer or precoat layer in a plate filter press, and plate filter press for performing the methodPASSAVANT WERKE·Filed 1982·Granted Jan 24, 1984·8 cites·4 claims
- 2441US4370232ASludge de-watering plant with a plurality of filter presses connected in parallelPASSAVANT WERKE·Filed 1981·Granted Jan 25, 1983·8 cites·8 claims
- 2541US4265749AChamber filter pressPASSAVANT WERKE·Filed 1979·Granted May 5, 1981·7 cites·2 claims
- 2641US4265171AApparatus for conveying and dewatering wet coarse screenings debrisPASSAVANT WERKE·Filed 1979·Granted May 5, 1981·5 cites·8 claims
- 2739US4298359ACentrifugal separator having heat transfer meansPASSAVANT WERKE·Filed 1980·Granted Nov 3, 1981·10 cites·2 claims
- 2839US4067807AProcess and apparatus for the operation of a filter press having a pressure tank communicating therewithPASSAVANT WERKE·Filed 1976·Granted Jan 10, 1978·6 cites·8 claims
- 2937US4354947AProcess for filtering sludge-like materials in a filter pressPASSAVANT WERKE·Filed 1980·Granted Oct 19, 1982·6 cites·2 claims
- 3036US4285818AProcess of treating wastewater with oxygenPASSAVANT WERKE·Filed 1979·Granted Aug 25, 1981·9 cites·15 claims
- 3136US3960991ARotary aeratorPASSAVANT WERKE·Filed 1974·Granted Jun 1, 1976·8 cites·16 claims
- 3236US3941701AApparatus for continuous dewatering of aqueous suspensionsPASSAVANT WERKE·Filed 1974·Granted Mar 2, 1976·6 cites·4 claims
- 3335US5431808ADevice for odor filtering of exhaust air from waste water treatmentPASSAVANT WERKE·Filed 1992·Granted Jul 11, 1995·7 cites·4 claims
- 3435US5011601AFilter plates for plate filter pressesPASSAVANT WERKE·Filed 1990·Granted Apr 30, 1991·6 cites·5 claims
- 3533US4486306AFilter press with filter plates mutually locked and individually consecutively slidable after release of locking meansPASSAVANT WERKE·Filed 1983·Granted Dec 4, 1984·4 cites·8 claims
- 3632US4139091ATransport device for the filter plates of a filter pressPASSAVANT WERKE·Filed 1977·Granted Feb 13, 1979·3 cites·3 claims
- 3732US4105559APlate-type filter pressPASSAVANT WERKE·Filed 1977·Granted Aug 8, 1978·3 cites·5 claims
- 3832US4052314AFilter plate for a plate type filter pressPASSAVANT WERKE·Filed 1976·Granted Oct 4, 1977·3 cites·5 claims
- 3930US5154830AProcess of removing phosphorus and suspended matter from waste waterPASSAVANT WERKE·Filed 1991·Granted Oct 13, 1992·7 cites·7 claims
- 4030US4417983AScraper apparatus for settling basins and the likePASSAVANT WERKE·Filed 1981·Granted Nov 29, 1983·7 cites·6 claims
- 4130US4324655AApparatus for treating wastewater with oxygenPASSAVANT WERKE·Filed 1980·Granted Apr 13, 1982·8 cites·20 claims
- 4230US4318670AScrew pump for conveying waste water and the likePASSAVANT WERKE·Filed 1980·Granted Mar 9, 1982·7 cites·9 claims
- 4328US5194148AHydraulic cylinder extension device for a filter pressPASSAVANT WERKE·Filed 1991·Granted Mar 16, 1993·5 cites·3 claims
- 4428US5045191ANon-clogging filtrate outlet stopper for use in a plate filter pressPASSAVANT WERKE·Filed 1990·Granted Sep 3, 1991·5 cites·9 claims
- 4524US5296142AChamber filter pressPASSAVANT WERKE·Filed 1993·Granted Mar 22, 1994·0 cites·5 claims
- 4623US5462663ASuspension and guidance mechanism for the filter plates of a filter pressPASSAVANT WERKE·Filed 1993·Granted Oct 31, 1995·0 cites·3 claims
- 4723US5330660AMethod for evacuating floating sludge from settling tanks and thickener tanksPASSAVANT WERKE·Filed 1992·Granted Jul 19, 1994·6 cites·11 claims
- 4822US5160612ALifting support frame for a filter pressPASSAVANT WERKE·Filed 1991·Granted Nov 3, 1992·3 cites·12 claims
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