| Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632) |
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| 05/09/1990 | EP0366845A1 Method for stabilizing metal ions |
| 05/08/1990 | US4923767 Fuel cell power plants employing an aqueous solution |
| 05/08/1990 | US4923617 Process for inhibiting scale formation |
| 05/08/1990 | CA1268774A1 Polymaleic acid, its preparation and its use |
| 04/25/1990 | EP0364681A2 Copolymers of unsaturated carboxylic acids, and their use |
| 04/24/1990 | US4919821 Modified maleic anhydride polymers and the like for use as scale inhibitors |
| 04/19/1990 | WO1990004159A1 Method for monitoring polyacrylic scale inhibitor content |
| 04/18/1990 | EP0364030A1 Synergistic compositions and method for inhibiting carbon steel corrosion in aqueous systems |
| 04/18/1990 | EP0363439A1 Treatment for water systems to inhibit corrosion and scale formation |
| 04/18/1990 | CN1041341A Treatment of aqueous systems |
| 04/18/1990 | CN1041340A Water reusing technology and equipment by lime processing of dregs |
| 04/10/1990 | US4915845 Inhibition method |
| 04/04/1990 | EP0361248A1 Method of treating cooling water |
| 04/03/1990 | US4913880 Novel amine-containing copolymers and their use |
| 04/03/1990 | US4913824 On metal surfaces in contact with industrial cooling water |
| 04/03/1990 | US4913823 Dissolving magnesium silicate by adding a phosphinopoly-carboxylic acid compound or a hypophosphorous acid-modified polyacrylic acid |
| 04/03/1990 | US4913822 Water soluble acrylic acid copolymer, phosphonate compound, zinc salt |
| 03/28/1990 | EP0360747A2 Telomeric compound |
| 03/28/1990 | EP0360746A2 Phosphonic compounds |
| 03/28/1990 | EP0360745A1 Treatment of aqueous systems |
| 03/28/1990 | CN1040776A Boiler incrustation-proof descaling agent |
| 03/28/1990 | CN1040745A Process of making and using polyamide membranes useful for water softening |
| 03/22/1990 | DE3832046A1 Process for treating paint mist wash water |
| 03/21/1990 | CN1040652A Inhibition of reservoir scale |
| 03/13/1990 | US4908138 Hydroxyacetonitrile diphosphonic acid, a process for its production, and its use |
| 03/13/1990 | CA1266599A1 Acrylic acid/2-acrylamido-2-methylpropylsulfonic acid/2-acrylamido-2-methylpropyl phosphonic acid polymers as scale and corrosion inhibitors |
| 03/06/1990 | US4906384 No drain acid treatment of pools |
| 03/06/1990 | US4906383 Novel amine-containing copolymers and their use |
| 02/28/1990 | EP0355886A1 A process for chemical softening of water with the crystallization method in a grain reactor |
| 02/22/1990 | DE3828229A1 Means for cleaning, disinfection and maintaining drinking water plants and beverage industry plants |
| 02/13/1990 | US4900451 Method of controlling manganese deposition in open recirculating aqueous systems |
| 02/13/1990 | US4899398 Polyesters for capturing heavy metals and inhibiting staining |
| 02/07/1990 | EP0353817A1 Method for controlling scale deposition in aqueous systems using allyl sulfonate maleic anhydride polymers |
| 02/07/1990 | CN1039400A Making method used in oil field for flocculated-etching-retarding agent |
| 02/07/1990 | CN1006700B Cleaming agent for remove incrustant in stainless steel heat exchanger |
| 02/06/1990 | US4898686 Zinc stabilization with modified acrylamide based polymers and corrosion inhibition derived therefrom |
| 02/06/1990 | US4898684 Novel amine-containing copolymers and their use |
| 02/06/1990 | US4898677 Acrylic acid-alkali metal vinyl sulfonate copolymer water solubility enhancer |
| 01/31/1990 | CN1039232A Compounded water treating agent with silicate coating |
| 01/23/1990 | US4895916 Substituted allyloxyalkylenes, antiscaling, antideposit, corrosion resistance |
| 01/23/1990 | US4895664 Water treatment polymers and methods of use thereof |
| 01/23/1990 | US4895663 Water treatment polymers and methods of use thereof |
| 01/23/1990 | US4895658 Membrane cleaning compositions containing acrylic polymer |
| 01/17/1990 | EP0350985A2 Method for controlling scale deposition in aqueous systems using quaternary ammonium/maleic anhydride-type polymers |
| 01/17/1990 | EP0350536A1 Use of a stainless steel sponge to reduce scale in a water reservoir and suchlike |
| 01/17/1990 | CN1006460B Composition for inhibiting inorganic salt scale formation |
| 01/16/1990 | US4894169 Method of inhibiting iron salt deposition in aqueous systems using urea salts |
| 01/09/1990 | US4892898 Water soluble polymers containing allyloxybenzenesulfonate monomers |
| 01/09/1990 | US4892679 Water treatment, sequestering, antiscaling |
| 01/03/1990 | EP0238579B1 Process and agent for water treatment |
| 01/02/1990 | US4891150 Liquid sanitary cleansing and descaling agents and process for their production |
| 12/27/1989 | CN1038286A Sulfonated bodies of conjugated diolefine,their polymers and polymeric dispersion compositions |
| 12/26/1989 | US4889637 Scale control with terpolymers containing vinyl alcohol |
| 12/20/1989 | CN1038079A Method for preventing salt deposit in closed water supply sealed system |
| 12/20/1989 | CN1038078A High efficiency boiler scale remover |
| 12/13/1989 | EP0346139A2 Corrosion control |
| 12/12/1989 | US4886859 Reducing boiler scale and hard water deposits |
| 12/12/1989 | US4886617 Antideposit, antiscaling agents |
| 12/05/1989 | US4885097 Stabilization of metal ions with terpolymers containing styrene sulfonic acid |
| 11/29/1989 | EP0344064A1 Product for treating swimming pool water |
| 11/28/1989 | US4883600 Adding nitrogen compound |
| 11/23/1989 | EP0189401B1 Electrostatic water treatment and electrode therefor |
| 11/22/1989 | CN1037281A Composition for introduction into high temp. environment |
| 11/14/1989 | US4880575 Olefinic diphosphonic acids, a process for their production, their use as thresholders and complexing compositions containing them |
| 11/08/1989 | EP0340666A1 Composition for introduction into a high temperature environment |
| 11/07/1989 | CA1262667A1 Biocidal mixture |
| 11/02/1989 | WO1989010182A1 Composition for introduction into a high temperature environment |
| 10/31/1989 | US4877536 Method of treating saline water |
| 10/31/1989 | US4877535 Iron dispersant for boiler water |
| 10/31/1989 | US4877489 Electronic control and dosing system for desalinators |
| 10/25/1989 | EP0338697A1 Method and system for variable frequency electromagnetic water treatment |
| 10/18/1989 | EP0337738A2 Process for producing a sulfonation product of conjugated diene, polymer of the sulfonation product and dispersion composition containing the sulfonation product and/or of the polymer |
| 10/18/1989 | EP0337694A2 Process for producing acid-type maleic acid polymer and water-treating agent and detergent additive containing said polymer |
| 10/17/1989 | US4874541 Mixture of glucoheptonate, sulfite, polyhydroxy acid, diethylethanolamine and polymer |
| 10/17/1989 | US4874540 Water treatment |
| 10/17/1989 | US4874535 Scale inhibitors |
| 10/17/1989 | US4874527 Using polyethylenimine |
| 10/17/1989 | US4874526 Using phosphonium compound |
| 10/12/1989 | DE3909075A1 Novel polymers |
| 10/10/1989 | US4872996 Anti fouling,-deposit, and -scaling agents; cooling systems |
| 10/10/1989 | US4872995 Method for calcium oxalate scale control |
| 10/04/1989 | EP0335043A1 Method and apparatus for softening tap or other water before use |
| 09/26/1989 | US4869845 Water treatment compositions |
| 09/26/1989 | US4869830 Separation, deoiling and softening of water; energy efficient |
| 09/26/1989 | US4869828 Stabilization of iron in aqueous systems |
| 09/26/1989 | US4869827 Aminoalkylenephosphonic acid, manganese compound, water soluble polymer |
| 09/26/1989 | CA1261228A1 Method for inhibiting aluminum-based deposition in water systems |
| 09/19/1989 | US4868287 Inhibition of mineral deposition by polyanionic/hydrophobic peptides and derivatives thereof having a clustered block copolymer structure |
| 09/19/1989 | US4868263 Novel amine-containing copolymers and their use |
| 09/19/1989 | US4867944 Compounds of zinc, molybdenum and phosphates |
| 09/12/1989 | US4866161 Inhibition of tartar deposition by polyanionic/hydrophobic peptides and derivatives thereof which have a clustered block copolymer structure |
| 09/06/1989 | EP0330876A1 Stabilization of iron in aqueous systems |
| 09/05/1989 | US4863614 Water treatment polymers and methods of use thereof |
| 09/05/1989 | CA1258963A1 Synergistic scale and corrosion inhibiting admixtures containing carboxylic acid/sulfonic acid polymers |
| 08/30/1989 | EP0330413A2 Method for inhibition of scale formation, compositions thereof and method for preparation of such compositions |
| 08/30/1989 | EP0330075A2 Oxa-alkanepolyphosphonic acids, their use as thresholds and complexant compositions containing these compounds |
| 08/29/1989 | US4861564 Method of use of 1,3 disubstituted aromatic cyclohexane imides as chelating agents |
| 08/29/1989 | US4861386 Enhanced cleaning procedure for copper alloy equipment |
| 08/23/1989 | EP0328567A1 Process and installation for preventing corrosion of water pipes. |
| 08/23/1989 | CN1034911A Solid water treating agent |