| Patents for C02F 5 - Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (8,632) |
|---|
| 07/07/1998 | US5776875 Use of biodegradable polymers in preventing scale build-up |
| 07/07/1998 | US5776348 Using calprotectin; preventing kidney stones |
| 07/07/1998 | US5776333 On premise water treatment apparatus |
| 07/02/1998 | WO1998028485A1 Household appliance and cassette with disincrustant means, and disincrustant method in a household appliance |
| 07/02/1998 | WO1998028232A1 Organosilic system with disincrustant action in aqueous media |
| 07/01/1998 | EP0850963A1 Hydrophilic graft polymer, production process therefor, composition containing the polymer, and use thereof |
| 07/01/1998 | EP0850198A1 Magnesiosilicates |
| 07/01/1998 | EP0695289B1 Hydroxamic acids and hydroxamic acid ethers and their use as complexing agents |
| 07/01/1998 | CN2285289Y Pipe type permanent magnetic scale remover |
| 06/30/1998 | US5773565 Reacting maleic acid with ammonia; heating to dehydrate; salt formation |
| 06/30/1998 | US5772913 Polyether polyamino methylene phosphonate, terpolymer of acrylic acid, sulfophenoxymethallyl ether and maleic acid, hydroxyphosphonoacetic acid, phosphonocarboxylic acid copolymer |
| 06/30/1998 | US5772893 Ether diphosphonate scale inhibitors |
| 06/23/1998 | CA2019163C Steam injection process for recovering heavy oil |
| 06/17/1998 | CN1184784A Method and device for phosphine type scale prevention agent quick decomposition |
| 06/10/1998 | DE19647293C1 Verhinderung und Verzögerung der Belagsbildung in Membranprozessen Prevention and delay of scale formation in membrane processes |
| 06/09/1998 | US5764717 Chemical cleaning method for the removal of scale sludge and other deposits from nuclear steam generators |
| 06/09/1998 | US5762821 Compound for removing alkaline earth metal scale deposits and silica-based scale deposits |
| 06/02/1998 | US5760154 Water soluble; biodegradable |
| 05/28/1998 | WO1998022205A1 Inhibition and delay of deposit formation in membrane processes |
| 05/28/1998 | CA2271490A1 Inhibition and delay of deposit formation in membrane processes |
| 05/27/1998 | CN1182718A Biocidal algae-killing agent and synthetic method for industrial water treatment thereof |
| 05/26/1998 | US5756594 Catalytic polymerization of aldehyde carboxylate monomer to form polyacetal and crosslinking with polyvinyl ethers, diesters, diepoxides, anhydrides, dinitriles and diacyl compounds |
| 05/26/1998 | US5755972 Method for metal sulfate scale control in harsh oilfield conditions |
| 05/26/1998 | US5755971 Alcohol fermentation; adding lignosulfonate and a phosphate compound |
| 05/20/1998 | EP0842124A1 House water decalcifying process |
| 05/14/1998 | WO1998003051A3 Polymer dispersants and methods of use in a nuclear steam generator |
| 05/13/1998 | EP0841350A1 Carboxylated polymers, process for the production of the same, and gels thereof |
| 05/13/1998 | CN1181357A Drum descaling method of waste water centrifugal extraction and reverse extraction unit |
| 05/12/1998 | US5751598 Water softening apparatus with microprocessor control |
| 05/12/1998 | US5750070 Poly(amino acid) polymers that include hydroxamic acid-containing sidechains |
| 05/05/1998 | US5747619 Water-soluble, carboxyl-containing copolymers, the preparation thereof and the use thereof as scale inhibitor |
| 04/29/1998 | EP0838538A1 Hydroxyimino alkylene phosphonic acids for corrosion and scale inhibition in aqeous systems |
| 04/29/1998 | EP0838519A1 Water-softening and detergent compositions |
| 04/28/1998 | US5743034 Household steam appliance having a scale-preventing device |
| 04/23/1998 | CA2218797A1 Hydroxyimino aklylene phosphonic acids for corrosion and scale inhibition in aqueous systems |
| 04/22/1998 | EP0750592B1 Method and device for decarbonating untreated water |
| 04/21/1998 | US5741783 Treating chitosan with formaldehyde and hydrogen cyanide yields mixtures for use in films and membranes, water treatment, complexing agents, stabilizers and cosmetics |
| 04/21/1998 | CA2057822C Water treatment agent |
| 04/15/1998 | CN1179138A Scale control in aqueous industrial systems |
| 04/08/1998 | EP0715635B1 Water-soluble copolymerizates containing carboxyl groups, methods of producing said copolymerizates, and use thereof as scale inhibitors |
| 04/07/1998 | US5736058 Method for inhibiting microbial adhesion on surfaces |
| 04/01/1998 | EP0832854A1 Sulfobetaine-containing polymers and their utility as calcium carbonate scale inhibitors |
| 04/01/1998 | EP0832851A1 Biodegradable poly (amino acids), derivatized amino acid polymers and methods for making the same |
| 04/01/1998 | EP0775168B1 Method for producing condensation polymers of aspartic acid and use of the condensation polymers |
| 03/31/1998 | US5733463 Lowering the pH with an acid/base salt as a pH adjusting agent |
| 03/31/1998 | US5733460 Descaling for treatment of bauxite for titanium silicate |
| 03/31/1998 | US5733459 Purification of bauxite by descaling with hydroxamic acid or salt |
| 03/31/1998 | US5733342 Builders and bleach stabilizers in detergents and cleaning compounds |
| 03/25/1998 | EP0831066A1 Biodegradable Aspartic acid polymers for preventing scale formation in boilers |
| 03/25/1998 | EP0831065A1 A method for controlling scale in an aqueous system using a synergistic composition |
| 03/25/1998 | CN2276841Y Electrode descaling device |
| 03/20/1998 | CA2210329A1 Biodegradable aspartic acid polymers for preventing scale formation in boilers |
| 03/19/1998 | CA2202946A1 Sulfobetaine-containing polymers and their utility as calcium carbonate scale inhibitors |
| 03/18/1998 | CN1176229A Compound corrosion-inhibiting antisludging agent used in treating circular cooling water |
| 03/11/1998 | EP0775170B1 Method for producing condensates of aspartic acid |
| 03/11/1998 | CN1175591A Method of producing hydrosolubles polymers, polymers thus obtained and uses of same |
| 03/10/1998 | US5726280 Sulfonic acid group-containing polyaspartic acid derivatives, use thereof and prepartion thereof |
| 03/10/1998 | US5726267 Preparation and utility of water-soluble polymers having pendant derivatized amide, ester or ether functionalities as ceramics dispersants and binders |
| 03/04/1998 | CN1174817A Method for metal sulfate scale control in Harsh oilfield conditions |
| 02/25/1998 | EP0777696B1 Process for preparing polyaspartic acid salts |
| 02/25/1998 | EP0669898B1 Method for removing at least one constituent from a solution |
| 02/25/1998 | CN2275091Y Strong electronic scale proofing and scale removing device |
| 02/25/1998 | CN1174186A Boiling-preventing and antifreezing coolant for diesel locomotive |
| 02/24/1998 | US5720884 Method for automatic control of corrosion in a water distribution system |
| 02/19/1998 | WO1998006673A1 Method for the prevention of scale formation by using an ether-1,1-diphosphonate |
| 02/19/1998 | WO1998006483A1 Method and apparatus for high efficiency reverse osmosis operation |
| 02/19/1998 | CA2260904A1 Method for the prevention of scale formation by using an ether-1,1-diphosphonate |
| 02/18/1998 | EP0823923A1 Process for preparing polymers with recurring succinyl units |
| 02/11/1998 | EP0823402A2 Use of biodegradable polymers in preventing corrosion and scale build-up |
| 02/11/1998 | EP0822923A1 Stabilization of water |
| 02/11/1998 | EP0822922A1 Water softening apparatus with microprocessor control |
| 02/11/1998 | EP0822921A1 Treatment for inhibiting microbial adhesion on surfaces |
| 02/10/1998 | US5716529 Using an addition polymer containing conjugated diene sulfonic acid monomer |
| 02/04/1998 | EP0822270A1 Water-treatment composition and method of use |
| 02/04/1998 | EP0669958B1 Mixtures of polymers of monoethylenically unsaturated dicarboxylic acids and polymers of ethylenically unsaturated monocarboxylic acids and/or polyaminocarboxylic acids, and the use of such mixtures |
| 02/04/1998 | CN2273702Y Device for magnetizing for preventing container from being scaled |
| 01/29/1998 | WO1998003051A2 Polymer dispersants and methods of use in a nuclear steam generator |
| 01/28/1998 | EP0821054A2 Use of polyaspartic acids and their salts |
| 01/21/1998 | EP0819704A1 Process for preparing polymers soluble in water, polymers thus prepared and their use |
| 01/21/1998 | EP0819653A2 Use of biodegradable polymers in preventing scale build-up |
| 01/21/1998 | CN1171145A Compressor installation |
| 01/20/1998 | US5709814 Aqueous system containing a synergistic phosphonate scale control combination |
| 01/19/1998 | CA2210073A1 Use of biodegradable polymers in preventing corrosion and scale build-up |
| 01/16/1998 | CA2210355A1 Use of biodegradable polymers in preventing scale build up |
| 01/14/1998 | EP0818423A1 Scale inhibition process |
| 01/14/1998 | CN2272552Y Scale proof box type water heater |
| 01/13/1998 | US5708108 Water treatment polymer containing poly oxy- (hydroxymethyl)-1,2-ethanediyl!! macromonomers and methods of use thereof |
| 01/13/1998 | US5707529 Synergistic mixture containing polyether tetrakis/aminomethylenephosphonate/ |
| 01/09/1998 | CA2208936A1 Scale deposit inhibitor for kraft digesters and method for controlling scale deposition in kraft digisters |
| 01/08/1998 | WO1998000012A1 Agricultural compositions containing glycolic acid |
| 01/07/1998 | EP0815060A1 Scale control in aqueous industrial systems |
| 01/06/1998 | US5705077 Polyepoxysuccinic acid |
| 12/30/1997 | US5702634 Mixture containing terpolymer of acrylic acid, sulfophenomethallyl ether and maleic acid |
| 12/30/1997 | CA2020153C Device for eliminating boiler scale and/or preventing the formation of boiler scale |
| 12/17/1997 | EP0812808A1 Water softening tablets |
| 12/17/1997 | EP0812805A2 Process and apparatus for treating cold water |
| 12/17/1997 | EP0719317A4 Mixtures of polyamino acids and citrate |
| 12/16/1997 | US5698132 Process for stabilizing inorganic salts |
| 12/10/1997 | EP0811578A2 Device for fluid sterilization |
| 12/09/1997 | US5696696 Apparatus and method for automatically achieving and maintaining congruent control in an industrial boiler |