| Patents for C02F 1 - Treatment of water, waste water, or sewage (145,124) |
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| 01/02/1991 | EP0405712A2 Protonated Mannich polymers |
| 01/02/1991 | EP0405565A1 Process and apparatus for cleaning fumes containing nocif substances while avoiding residual salts |
| 01/02/1991 | EP0404828A1 Method for catalytic destruction of organic materials. |
| 01/02/1991 | EP0289602B1 Installation for purification of sewage water |
| 01/02/1991 | CN2068504U Domestic high frequency water trealer |
| 01/02/1991 | CN2068503U Floatation purifier |
| 01/02/1991 | CN2068502U Coarse granular sewage containing oil separator |
| 01/02/1991 | CN2068501U Domestic mineral purifier |
| 01/02/1991 | CN1048207A Method for processing organic waste and apparatus therefor |
| 01/02/1991 | CN1048206A Preammoniation treatment of water for washing purified ammonia with mixed gas |
| 01/02/1991 | CA1278530C Filter apparatus for removing hydro carbon contaminents from water, particularly for purifying oil contaminated water |
| 01/01/1991 | US4981675 Polymeric basic aluminum silicate-sulphate |
| 01/01/1991 | US4981673 Water treatment |
| 01/01/1991 | US4981599 Flocculation, settling |
| 01/01/1991 | US4981594 Waste water purification system |
| 01/01/1991 | US4981593 Sewage treatment |
| 12/31/1990 | WO1991000132A1 Protonated mannich polymers |
| 12/31/1990 | CA2035467A1 Protonated mannich polymers |
| 12/30/1990 | WO1991000242A1 Ozone generator |
| 12/30/1990 | CA2062772A1 Ozone generator |
| 12/30/1990 | CA2020069A1 Treatment process and apparatus of water-ink containing affluents |
| 12/27/1990 | WO1990015779A1 Device for electroactivating fluids and preparations consisting of electroactivated fluids |
| 12/27/1990 | WO1990015651A1 Method and apparatus for liquid-liquid separation |
| 12/27/1990 | WO1990015530A1 Device for organic neutralization and removal of phosphorus compounds present in water basins |
| 12/27/1990 | WO1990014312A3 Process and apparatus for the purification of contaminated water by activated ozone |
| 12/27/1990 | EP0404573A2 Water dispenser |
| 12/27/1990 | EP0404276A1 Mixer reactor |
| 12/27/1990 | EP0311632A4 Surface active lactams |
| 12/26/1990 | CN2068097U Automatic control electroplate waste water purification device |
| 12/26/1990 | CN1048020A Novel flocculant for the recovery of protein |
| 12/26/1990 | CN1048019A Process for wastewater treatment and the recovery of 0-phenylenediamine |
| 12/26/1990 | CN1010956B Method for reclaiming the used pickle of titanium and its alloy |
| 12/26/1990 | CN1010937B Recovery of organic acids catalyst and water from terephehalic acid mfr. |
| 12/26/1990 | CN1010916B Baling machine and baled products |
| 12/25/1990 | US4980434 Absorbent polymers, their manufacture and uses |
| 12/25/1990 | US4980128 Control of corrosion in aqueous systems |
| 12/25/1990 | US4980072 Using polyether with isocyanate end groups |
| 12/25/1990 | US4980071 Substituted thioureas for the separation of complexly bound heavy-metal ions |
| 12/25/1990 | US4980056 Micororganism-free water supply system |
| 12/25/1990 | US4979886 Spray aeration of heated water stream under vacuum |
| 12/25/1990 | US4979654 Cap for use with water treatment apparatus |
| 12/23/1990 | CA2019538A1 Cleaning composition |
| 12/22/1990 | CA2019706A1 Filter and apparatus using filter |
| 12/20/1990 | WO1990015778A1 Process and device for treating polluted fluids |
| 12/20/1990 | DE3919885A1 Verfahren und anlage zur behandlung von mit schadstoffen belasteten fluessigkeiten Liquids method and system for treatment of contaminated with pollutants |
| 12/19/1990 | EP0403465A1 Biocidal methods for recirculating water systems |
| 12/19/1990 | EP0403244A1 Water treatment process |
| 12/19/1990 | EP0402737A2 Process and apparatus for the treatment of sludges containing heavy metals |
| 12/19/1990 | EP0402661A1 Portable water purification devices using low density activated carbon |
| 12/19/1990 | EP0402590A1 Removal of trace contamination from water |
| 12/19/1990 | EP0402515A1 Process and sludge contact reactor for waste water treatment by pulsated flocculation and separation |
| 12/19/1990 | EP0402406A1 Portable water-purifying devices. |
| 12/19/1990 | EP0402375A1 Electric pulse generator for reducing the formation of salt incrustations on a wall. |
| 12/19/1990 | EP0330659B1 Process for separating hydrocarbons from waste water |
| 12/19/1990 | EP0248050B1 Marine biofouling reduction |
| 12/19/1990 | EP0215898B1 Liquid membrane system for the removal of nitrate from water |
| 12/19/1990 | CN2067709U Device for improving water quality of shallow water area |
| 12/19/1990 | CN2067708U Combined ion exchange water processor with float bed |
| 12/19/1990 | CN2067597U Floating separator for mixture of oil and water |
| 12/19/1990 | CN1047843A Method for treating waste water from alcohol production by dried sweet potato fermentation |
| 12/19/1990 | CN1010853B Steam power equipment generating steam from natural water contg. salt |
| 12/18/1990 | US4978685 Control of biofouling in aqueous systems by non-polymeric quaternary ammonium polyhalides |
| 12/18/1990 | US4978550 Carbonation, pressurization |
| 12/18/1990 | US4978508 Blending with water and surfactant, reacting with ozone, illuminating with ultraviolet radiation, screening, flocculation and segmentation |
| 12/18/1990 | US4978459 Oil spill microemulsion dispersants |
| 12/18/1990 | US4978458 Sterilization with high density solar beams, decomposition of of microorganisms |
| 12/18/1990 | US4978457 Method of filtering a brine |
| 12/18/1990 | US4978455 P-xylylenediamide/diimide composite RO membranes |
| 12/18/1990 | US4978449 Water purifier with air-passing retainer above water inlet |
| 12/18/1990 | US4978438 Electrolytic cell |
| 12/18/1990 | US4978429 Apparatus including its own combination manifold/support assembly for producing a concentrate and a distillate |
| 12/17/1990 | WO1990015780A1 Biocidal methods and compositions for recirculating water systems |
| 12/14/1990 | CA2019010A1 Water treatment process |
| 12/13/1990 | WO1990015547A1 High pulsed voltage systems for extending the shelf life of pumpable food products |
| 12/13/1990 | WO1990015028A1 A method for biological treatment of wastewater |
| 12/13/1990 | WO1990015027A2 Methods for removing substances from aqueous solutions |
| 12/13/1990 | WO1990015026A1 Process for reduction of hexavalent chromium |
| 12/13/1990 | WO1990015025A1 Electrolytic water purification |
| 12/13/1990 | DE4018162A1 Aq. mineral, filler or pigment slurry with high solids content |
| 12/13/1990 | DE4001011C1 Ground water flow control - comprises shaft sunk into ground water levels with successive permeable and impermeable wall areas |
| 12/13/1990 | DE3918527A1 Device for disposal of sewage sludge - comprises rotating drum dryer and filter band press used instead of centrifuge to improve throughput of sludge drying system |
| 12/13/1990 | DE3918427A1 Procedure and device for desalinating sea water - comprising floating solar energy absorbing surface which evaporates sea water which is connected by covering surface |
| 12/13/1990 | DE3918343A1 Liq.-liq. separator - comprising gravity separator provided with small opening equalising chamber and heavy liq. outlet |
| 12/13/1990 | DE3842226A1 Sanitary therapy device to improve vision, hearing, breathing and drinking |
| 12/13/1990 | DE3840364A1 Apparatus for water treatment in the public health area in health + environmental protection - to improve the quality of life for connection to conventional pressurised water lines containing mains water, spring water or solids-free wastewaters or in the separation of solids in food production or the like and contains a process in the public health area |
| 12/12/1990 | EP0402347A1 Method of removing amines |
| 12/12/1990 | EP0402275A1 Composition comprising thermoplastic silicone polymer and iodine compound and its use for the treatment of water after shaping process |
| 12/12/1990 | EP0401884A2 Reactor for photooxidations in an aqueous environment |
| 12/12/1990 | EP0401790A2 Highly concentrated aqueous slurry of minerals and/or fillers and/or pigments |
| 12/12/1990 | EP0401539A2 Hydrogen eliminator |
| 12/12/1990 | EP0401535A1 Water treatment device |
| 12/12/1990 | EP0229798B1 Electrode unit to be used for purification of emulsions and polluted waters, especially oil-bearing waters, by means of electrolysis |
| 12/12/1990 | CN1010773B Treatment of fluorine containing mine waste water |
| 12/12/1990 | CN1010772B Treatment apparatus for sewage |
| 12/11/1990 | USRE33487 For deionization of water or extraction and analysis of inorganic ions in soil |
| 12/11/1990 | US4976876 Point-of-use membrane filtration system |
| 12/11/1990 | US4976874 Reducible polyhalide antifouling agents which release oxidizing halogens |
| 12/11/1990 | US4976871 Method of monitoring flocculant effectiveness |
| 12/11/1990 | US4976870 Wash water reservoiring method |
| 12/11/1990 | US4976866 Concentric tubular membrane device and process useful in ion exchange or absorbent processes |