4D002
|
TREATING WASTE GASES
|
4D003
|
Biological treatment of waste water
|
4D004
|
Processing of solid wastes
|
4D005
|
Coagulation and sedimentation treatment
|
4D006
|
SEPARATION USING SEMI-PERMEABLE MEMBRANES
|
4D011
|
Degasification and air bubble elimination
|
4D012
|
SEPARATION OF GASES BY ADSORPTION
|
4D014
|
Separation of liquids from each other
|
4D015
|
Separation of suspended particles by flocculating agents
|
4D016
|
Static filter element filters
|
4D017
|
Treatment of liquids with adsorbents in general
|
4D018
|
Multiple filters and filter presses
|
4D019
|
FILTERING MATERIALS
|
4D020
|
GAS SEPARATION BY ABSORPTION
|
4D021
|
Combined means for separation of solids
|
4D024
|
Treatment of water by adsorption
|
4D025
|
Treatment of water by ion exchange
|
4D026
|
CARTRIDGE FILTERS; FILTERS WITH MOVING FILTERING ELEMENTS
|
4D027
|
Treatment of biological wastes in general
|
4D028
|
ACTIVATED SLUDGE PROCESSES
|
4D029
|
Aeration devices for treatment of activated polluted sludge
|
4D030
|
Water treatment in general
|
4D031
|
Separating particles in gases by inertia, etc.
|
4D032
|
Separation of particles using liquids
|
4D033
|
Gas particle separation; other treatments
|
4D034
|
Heat treatment of water, waste water or sewage
|
4D036
|
Isotope separation
|
4D037
|
PHYSICAL WATER TREATMENTS
|
4D038
|
REMOVAL OF SPECIFIC SUBSTANCES
|
4D039
|
Neutralization and property modification
|
4D040
|
PURIFICATION TREATMENTS BY ANAEROBIC OR ANAEROBIC AND AEROBIC BACTERIA OR ANIMALS
|
4D041
|
Gravity filters
|
4D043
|
Adjustment and processing of grains
|
4D045
|
Preventing scale
|
4D046
|
Multi-stage treatment of water and waste water
|
4D047
|
Separation by low-temperature treatments
|
4D048
|
EXHAUST GAS TREATMENT BY MEANS OF CATALYST
|
4D049
|
Germicidal treatment with disinfectant
|
4D050
|
TREATMENT OF WATER BY OXIDATION OR REDUCTION
|
4D051
|
REMOVAL OF FLOATING MATERIAL
|
4D052
|
DRYING OF GASES
|
4D053
|
Cyclones
|
4D054
|
ELECTROSTATIC SEPARATION
|
4D055
|
Crystallizing
|
4D056
|
Extraction or liquid replacement
|
4D057
|
Centrifugal separators
|
4D058
|
FILTERING OF DISPERSED PARTICLES IN GASES
|
4D059
|
TREATMENT OF SLUDGE
|
4D060
|
Other gas separation (electric effect etc.) and control
|
4D061
|
Water treatment by electricity or magnetism
|
4D063
|
Crushing and grinding
|
4D064
|
SPECIAL FILTERING DEVICES
|
4D065
|
CRUSHING AND PULVERIZATION PROCESSES (2)
|
4D066
|
Filtration and precoating processes
|
4D067
|
Disintegrating or milling
|
4D068
|
Flotation classification and differential sedimentation
|
4D069
|
Electric and magnetic filters and other separation
|
4D070
|
Magnetic separation
|
4D071
|
Separation of solids by using liquids or pneumatic power
|
4D073
|
DETAILS OR ACCESSORIES OF SPRAYING PLANT OR APPARATUS
|
4D074
|
SPECIAL SPRAYING APPARATUS
|
4D075
|
Application of or painting with fluid materials
|
4D076
|
VAPORIZATION, DISTILLATION, CONDENSATION, SUBLIMATION, AND COLD TRAPS
|
4D077
|
EMULSIFYING, DISPERSING, FOAM-PRODUCING OR WETTING AGENTS
|
4D116
|
FILTRATION OF LIQUID
|
4D148
|
EXHAUST GAS TREATMENT BY MEANS OF CATALYST
|
4D624
|
WATER TREATMENT BY SORPTION
|