Assignee
DRAVO CORP
US123 patents
Top patents by PatentIndex Score
US4548315AOct 22, 1985
Tethered vehicle for moving bulk material
DRAVO CORP27 citations92
US4439307AMar 27, 1984
Heating process gas for indirect shale oil retorting through the combustion of residual carbon in oil depleted shale
DRAVO CORP130 citations92
US3992170ANov 16, 1976
Method and apparatus for melting ice in saline water conversion systems
DRAVO CORP33 citations92
US4714097ADec 22, 1987
Dust containment system for bulk cargo containers
DRAVO CORP25 citations91
US4699187AOct 13, 1987
Dust control in hoppers
DRAVO CORP43 citations91
US4626418ADec 2, 1986
Removal of SO2 from SO2 -containing gases
DRAVO CORP32 citations91
US4609321ASep 2, 1986
Rotary car dumper with dust collection system
DRAVO CORP28 citations91
US4479749AOct 30, 1984
Rotary car dumper installation with integral dust collection
DRAVO CORP28 citations91
US4179374ADec 18, 1979
Apparatus for the treatment of wastewater
DRAVO CORP64 citations91
US4420404ADec 13, 1983
Process for dewatering fine granular materials
DRAVO CORP35 citations88
US3966982AJun 29, 1976
Process and apparatus for treating oleaginous seed material
DRAVO CORP44 citations88
US4306895ADec 22, 1981
Coal stacking tower dust control system
DRAVO CORP56 citations87
US3977205AAug 31, 1976
Refrigerant mass flow control at low ambient temperatures
DRAVO CORP60 citations87
US3959084AMay 25, 1976
Process for cooling of coke
DRAVO CORP122 citations86
US4255089AMar 10, 1981
Method of controlling series fans driving a variable load
DRAVO CORP29 citations85
US4405050ASep 20, 1983
Quick roll adjustment for a roller screen conveyor
DRAVO CORP29 citations84
US4365725ADec 28, 1982
Basket with swing away double locking handle
DRAVO CORP28 citations82
US4238120ADec 9, 1980
Sealing device for sinter cooler
DRAVO CORP25 citations82
US4603225AJul 29, 1986
Process for separating dimethyl ether from a hydrocarbon mixture containing the same
DRAVO CORP33 citations81
US4263857AApr 28, 1981
Traveling grate stoker for the combustion of difficultly ignited fuels
DRAVO CORP25 citations81
US4222851ASep 16, 1980
Recovery of asphalt shingle components by solvent extraction
DRAVO CORP44 citations81
US4219416AAug 26, 1980
Process for recovering molybdenum and tungsten from mining wastewater
DRAVO CORP22 citations81
US4219470AAug 26, 1980
Process for preparing a protein concentrate and the product obtained thereby
DRAVO CORP29 citations81
US4144229AMar 13, 1979
Process for preparing a flour and the product obtained thereby
DRAVO CORP28 citations81
US4133718AJan 9, 1979
Method for agglomerating finely divided agglomerative materials in a rotary drum assembly
DRAVO CORP21 citations81
US3993535ANov 23, 1976
Multiple effect evaporation process
DRAVO CORP19 citations81
US4340207AJul 20, 1982
Waste heat recovery apparatus
DRAVO CORP26 citations80
US4067727AJan 10, 1978
Sintering process
DRAVO CORP20 citations80
US4359417ANov 16, 1982
Process for extracting oleaginous seed materials particularly cottonseed with aqueous alcohol
DRAVO CORP27 citations78
US4689007AAug 25, 1987
Process of thermally treating lump or agglomerated materials on a travelling grate
DRAVO CORP23 citations77
US4655401AApr 7, 1987
Rotary car dumper with lump breaker apparatus
DRAVO CORP22 citations77
US4363411ADec 14, 1982
Hammerhead crane with plural shuttle trolleys, a load trolley and movable counterweight means
DRAVO CORP25 citations76
US4113413ASep 12, 1978
Rotary scraper in a rotary drum assembly
DRAVO CORP20 citations76
US4683029AJul 28, 1987
Circular solvent extractor
DRAVO CORP23 citations75
US3958429AMay 25, 1976
Air-cooled condenser pressure control at low ambient temperatures
DRAVO CORP22 citations75
US4779992AOct 25, 1988
Lime slaker
DRAVO CORP17 citations73
US4506781AMar 26, 1985
Self training belt conveyor with digging elements
DRAVO CORP8 citations73
US4448667AMay 15, 1984
Process for solvent extraction of bitumen from oil sand
DRAVO CORP18 citations73
US4425220AJan 10, 1984
Method of and apparatus for processing of oil shale
DRAVO CORP26 citations73
US4422901ADec 27, 1983
Apparatus for the continuous solvent extraction of bitumen from oil-bearing sand
DRAVO CORP20 citations73
US4377220AMar 22, 1983
Automatic rail clamp
DRAVO CORP9 citations73
US4222872ASep 16, 1980
Reclamation of molybdenum or other heavy metals from wastewater treatment skimmings
DRAVO CORP11 citations73
US4219417AAug 26, 1980
Wastewater flotation utilizing streaming potential adjustment
DRAVO CORP18 citations73
US4004696AJan 25, 1977
Material handling apparatus with load compensated counterweight system
DRAVO CORP14 citations73
US3975044AAug 17, 1976
Reeving system for a scissor-type clamshell bucket
DRAVO CORP10 citations73
US3970764AJul 20, 1976
Process for preparing a protein concentrate with minimal protein denaturation
DRAVO CORP18 citations73
US4760968AAug 2, 1988
Integrated dust containment system for rotary crusher/breakers and the like
DRAVO CORP13 citations72
US4389243AJun 21, 1983
Method for the flash oxidation of metal concentrates
DRAVO CORP8 citations72
US4268204AMay 19, 1981
Continuous ship unloader
DRAVO CORP25 citations72
US4259085AMar 31, 1981
Pelletized fixed sulfur fuel
DRAVO CORP10 citations72
Showing the top 50 of 123 patents by PatentIndex Score.