Assignee
ENVIROTECH CORP
157 granted patents·3,246 citations·filing 1974–1990
Top patents by PatentIndex Score
157 records- 0194US4475453ALiquid-solid separation utilizing pressure rolls covered with elastomeric layersENVIROTECH CORP·Filed 1982·Granted Oct 9, 1984·50 cites·63 claims
- 0294US4266948AFiber-rejecting corona discharge electrode and a filtering system employing the discharge electrodeENVIROTECH CORP·Filed 1980·Granted May 12, 1981·106 cites·20 claims
- 0393US4256553ARecovering copper from chalcopyrite concentrateENVIROTECH CORP·Filed 1980·Granted Mar 17, 1981·72 cites·26 claims
- 0491US4130018AUltrasonic transducer with reference reflectorENVIROTECH CORP·Filed 1977·Granted Dec 19, 1978·75 cites·11 claims
- 0588US4248671ADry coke quenching and pollution controlENVIROTECH CORP·Filed 1979·Granted Feb 3, 1981·108 cites·6 claims
- 0687US4284417AMethod for controlling electric power supplied to corona generating electrodes in an electrostatic precipitatorENVIROTECH CORP·Filed 1980·Granted Aug 18, 1981·60 cites·6 claims
- 0786US4140012ASmall pipe flowmeterENVIROTECH CORP·Filed 1977·Granted Feb 20, 1979·54 cites·9 claims
- 0885US4282082ASlurry electrowinning apparatusENVIROTECH CORP·Filed 1980·Granted Aug 4, 1981·24 cites·13 claims
- 0985US4247370ACoke oven fumes control systemENVIROTECH CORP·Filed 1979·Granted Jan 27, 1981·50 cites·12 claims
- 1085US4066520ASlurry electrowinning processENVIROTECH CORP·Filed 1976·Granted Jan 3, 1978·21 cites·30 claims
- 1185US4063457AUltrasonic level sensing deviceENVIROTECH CORP·Filed 1976·Granted Dec 20, 1977·47 cites·16 claims
- 1285US3972682APyrolysis furnaceENVIROTECH CORP·Filed 1975·Granted Aug 3, 1976·47 cites·8 claims
- 1384US4931190AFlocculating agent combinations for mineral slime filtration systemsENVIROTECH CORP·Filed 1988·Granted Jun 5, 1990·54 cites·8 claims
- 1484US4299114AMethod of testing the integrity of an ultrasonic system for sensing liquid-fluid interfacesENVIROTECH CORP·Filed 1980·Granted Nov 10, 1981·48 cites·10 claims
- 1584US4215953ADevice for injecting cartridges of resin for bolting apparatusENVIROTECH CORP·Filed 1978·Granted Aug 5, 1980·27 cites·8 claims
- 1684US4182246AIncineration method and systemENVIROTECH CORP·Filed 1978·Granted Jan 8, 1980·45 cites·20 claims
- 1784US4008057AElectrostatic precipitator electrode cleaning systemENVIROTECH CORP·Filed 1974·Granted Feb 15, 1977·45 cites·12 claims
- 1883US4248164ASludge drying system with sand recycleENVIROTECH CORP·Filed 1979·Granted Feb 3, 1981·36 cites·9 claims
- 1983US4152070ATurbidimeterENVIROTECH CORP·Filed 1977·Granted May 1, 1979·38 cites·7 claims
- 2083US4055494AThickening device and methodENVIROTECH CORP·Filed 1977·Granted Oct 25, 1977·41 cites·21 claims
- 2183US4013023AIncineration method and systemENVIROTECH CORP·Filed 1975·Granted Mar 22, 1977·42 cites·23 claims
- 2282US5007620AApparatus for biological processing of metal-containing oresENVIROTECH CORP·Filed 1988·Granted Apr 16, 1991·49 cites·11 claims
- 2381US4159951ASector assemblyENVIROTECH CORP·Filed 1978·Granted Jul 3, 1979·34 cites·9 claims
- 2481US4039307ACountercurrent flow horizontal spray absorberENVIROTECH CORP·Filed 1976·Granted Aug 2, 1977·63 cites·16 claims
- 2580US4265587AQuick-coupling locking mechanismENVIROTECH CORP·Filed 1979·Granted May 5, 1981·27 cites·5 claims
- 2679US4246010AElectrode supporting base for electrostatic precipitatorsENVIROTECH CORP·Filed 1976·Granted Jan 20, 1981·39 cites·2 claims
- 2778US4588559ALime slaking system including a cyclone and classifier for separating calcium hydroxide and grit particles from a slurry thereofENVIROTECH CORP·Filed 1984·Granted May 13, 1986·34 cites·8 claims
- 2878US4267502APrecipitator voltage control systemENVIROTECH CORP·Filed 1979·Granted May 12, 1981·38 cites·12 claims
- 2977US4927537ATape drive with self-expanding coils for sludge collectorENVIROTECH CORP·Filed 1989·Granted May 22, 1990·39 cites·4 claims
- 3077US4215637ASystem for combustion of wet waste materialsENVIROTECH CORP·Filed 1979·Granted Aug 5, 1980·31 cites·11 claims
- 3177US3993563AGas ingestion and mixing deviceENVIROTECH CORP·Filed 1975·Granted Nov 23, 1976·36 cites·3 claims
- 3276US5227136ABioslurry reactor for treatment of slurries containing minerals, soils and sludgesENVIROTECH CORP·Filed 1990·Granted Jul 13, 1993·47 cites·21 claims
- 3376US4294591AMounting for high-voltage electrode support frame in an electrostatic precipitatorENVIROTECH CORP·Filed 1980·Granted Oct 13, 1981·33 cites·9 claims
- 3476US4008158ADewatering machineENVIROTECH CORP·Filed 1975·Granted Feb 15, 1977·30 cites·21 claims
- 3576US3947350AProcess of preparing sewage sludge for dewateringENVIROTECH CORP·Filed 1974·Granted Mar 30, 1976·22 cites·6 claims
- 3675US4147756ACombustion gas scrubbing systemENVIROTECH CORP·Filed 1976·Granted Apr 3, 1979·33 cites·23 claims
- 3772US4974816AMethod and apparatus for biological processing of metal-containing oresENVIROTECH CORP·Filed 1987·Granted Dec 4, 1990·28 cites·29 claims
- 3872US4697511AComposite roll covering for expressing machinesENVIROTECH CORP·Filed 1985·Granted Oct 6, 1987·20 cites·13 claims
- 3972US4378437ADigester apparatusENVIROTECH CORP·Filed 1981·Granted Mar 29, 1983·18 cites·3 claims
- 4072US4288229ADetermination of total organic carbon in a plurality of aqueous samples containing halide ionENVIROTECH CORP·Filed 1980·Granted Sep 8, 1981·35 cites·23 claims
- 4172US4229304AMolded thermoplastic filter plateENVIROTECH CORP·Filed 1979·Granted Oct 21, 1980·30 cites·12 claims
- 4272USD247480SUltrasonic flow meter housingENVIROTECH CORP·Filed 1976·Granted Mar 14, 1978·11 cites·1 claims
- 4371US4732608AMethod for biological processing of metal-containing oresENVIROTECH CORP·Filed 1986·Granted Mar 22, 1988·37 cites·15 claims
- 4471US4551285AFlotation machine and aeration impellerENVIROTECH CORP·Filed 1984·Granted Nov 5, 1985·23 cites·23 claims
- 4571US4482528ALime slaking and grit removal process utilized in SO2 removalENVIROTECH CORP·Filed 1983·Granted Nov 13, 1984·26 cites·14 claims
- 4671US4303516AOrbital wastewater treatment system with integral clarificationENVIROTECH CORP·Filed 1980·Granted Dec 1, 1981·30 cites·8 claims
- 4771US4159243AProcess and system for controlling an orbital systemENVIROTECH CORP·Filed 1977·Granted Jun 26, 1979·32 cites·3 claims
- 4871US4145979AAfterburner assemblyENVIROTECH CORP·Filed 1978·Granted Mar 27, 1979·29 cites·8 claims
- 4971US3958945ASparging deviceENVIROTECH CORP·Filed 1974·Granted May 25, 1976·20 cites·2 claims
- 5069US4933524AClarifier apparatus and methods with 3-D arraysENVIROTECH CORP·Filed 1989·Granted Jun 12, 1990·28 cites·70 claims
Showing the top 50 of 157 patent records by PatentIndex Score.
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