| Patents for C01G 49 - Compounds of iron (8,643) |
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| 06/08/1993 | US5217804 Magnetic particles |
| 06/08/1993 | US5217703 Oxidation of iron containing vapors |
| 06/08/1993 | US5217584 High yield, high speed reaction |
| 06/02/1993 | EP0544503A1 Flame-retardant aid, process for the production thereof, and flame-retardant resin composition |
| 06/01/1993 | US5215782 Dipping the substrate into water, adding ferrous ion solution, oxidizer and PH controller to control the oxidation-reduction potential and PH |
| 05/27/1993 | WO1993010038A1 Regeneration of hydrochloric acid |
| 05/27/1993 | DE4138700A1 Prodn. of ferromagnetic needle-like gamma iron (III) oxide - having high coercive field strength and used in prodn. of magnetic recording supports |
| 05/27/1993 | DE4136535C1 Low loss ferrite prodn. - involves mixing pre-sintered finely divided ferrite with water soluble vanadium salt and calcining for low brittleness |
| 05/27/1993 | DE4136534C1 Low loss ferrite prodn. - by mixing finely divided ferrite with powdered calcium oxide salt and sintering |
| 05/26/1993 | EP0542829A1 Method for producing magnetic microparticles from metallocenes. |
| 05/26/1993 | CN1020886C Process for preparing iron sulfate by dipping iron ore in oxidizing acid |
| 05/19/1993 | EP0541796A1 Ferrous salt composition |
| 05/19/1993 | CN1020712C Production process of ferric polysulfate from low-grade siderite |
| 05/13/1993 | WO1993008909A1 In situ use of gelatin in the preparation of uniform ferrite particles |
| 05/13/1993 | DE4136512A1 Compsn. for making conc. neutral metal oxide sol |
| 05/13/1993 | CA2121252A1 In situ use of gelatin in the preparation of uniform ferrite particles |
| 05/12/1993 | EP0541329A1 Composite metal hydroxide and process for the production thereof |
| 05/12/1993 | CN1071895A Process for producing high specific gravity ferric sulfate polymer |
| 05/05/1993 | CN1020445C Producing process for poly-ferric sulphate |
| 05/05/1993 | CN1020444C Rapid producing method for polymerzing ferric sulfate |
| 04/29/1993 | WO1993007967A1 Coal cleaning process |
| 04/14/1993 | EP0536224A1 Antiviral agents containing heteropolytungstate |
| 04/14/1993 | CN1071027A High-magnetic heat stability cobalt improved r-ferric oxide magnet powder and its made method |
| 04/14/1993 | CN1070893A Made method of ferrous sulfate for strengthening wheat flour |
| 04/13/1993 | US5202108 Heating ferric chloride, alkali metal carbonate in presence oxidizer and phosphate to form monohydrate beta-ferric oxide, reacting ferric oxide with caustic chlorinate solution to form alkali metal ferrate; recycling, reusing |
| 04/13/1993 | US5202043 Process for the preparation of isometric magnetic iron oxide |
| 04/07/1993 | EP0535813A2 Process for the preparation of acicular alpha-iron oxide hydrate |
| 04/06/1993 | US5200159 Purified solution containing iron and manganese, and method producing thereof |
| 04/01/1993 | WO1993006596A1 Hexagonal magnetic ferrite pigment for high density magnetic recording applications |
| 04/01/1993 | CA2115669A1 Hexagonal magnetic ferrite pigment for high density magnetic recording applications |
| 03/30/1993 | US5198025 Heat resistant |
| 03/24/1993 | EP0532788A1 Method of producing cast magnetic soft ferrite |
| 03/24/1993 | EP0532613A1 Ethylene sorbing substances. |
| 03/23/1993 | US5196052 Oxidation, solubilization of metal from a refractory ore |
| 03/18/1993 | WO1993004996A1 Improved mixed metal oxide crystalline powders and method for the synthesis thereof |
| 03/17/1993 | EP0532315A1 Magnetite particles and process for producing the same |
| 03/16/1993 | US5194241 From ferrous sulfate in closed circuit by oxidation under pressure using nitrogen oxides as catalyst |
| 03/16/1993 | US5194240 From ferrous sulfate by oxidation in a closed system with oxygen and using nitrogen oxides as catalyst |
| 03/10/1993 | EP0530810A2 Ultraviolet ray screening agent |
| 03/10/1993 | EP0530664A1 Novel method of manufacture of iron oxide particles |
| 03/02/1993 | US5190740 Method producing composite oxides for use as starting materials for producing ferrites |
| 02/24/1993 | EP0527908A1 New formulations for iron oxides dissolution |
| 02/24/1993 | CN1069246A Prodn. of ferroferric oxide |
| 02/10/1993 | EP0526661A1 Magnetic powder for magnetic recording and magnetic recording medium made thereof |
| 02/09/1993 | US5185141 Process for the production of iron oxide yellow pigments |
| 02/03/1993 | CN1068602A Microfiltration |
| 02/02/1993 | US5183709 Core; ferrite shell; alkali metal silicate adsorbed on surface; aging resistance |
| 01/26/1993 | US5181993 Process for converting ferrous ions to ferric ions |
| 01/20/1993 | EP0523399A1 Thermally stable black pigment, process for its preparation and its use |
| 01/19/1993 | US5180699 Lead-niobium-metal oxide ceramic produced from a niobic acid sol |
| 01/19/1993 | US5180505 Dewatering method |
| 01/13/1993 | CN1067971A Magnetic colour toning agent |
| 01/13/1993 | CN1067911A 制剂 Preparation |
| 01/13/1993 | CN1067867A Non-pollution producing technology of iron trichloride |
| 01/03/1993 | CA2072667A1 Temperature-resistant black pigment, a process for its production and its use |
| 12/30/1992 | EP0520651A1 Magnetic toner |
| 12/22/1992 | CA1311619C Use of citric acid partial esters for the extraction of iron |
| 12/17/1992 | DE4119719A1 Compsn. for making conc. neutral metal oxide sol |
| 12/16/1992 | EP0518410A1 Process and apparatus for the production of aqueous solutions of iron chloride |
| 12/16/1992 | EP0518175A2 Preparation of a neutral metal oxide sol |
| 12/15/1992 | CA1311493C Process for the preparation of dialkyldithiocarbamates of multivalent metals |
| 12/09/1992 | EP0517448A1 Fibrous composite metal hydroxide and process for the production thereof |
| 12/08/1992 | US5169620 Method and apparatus for the manufacture of iron oxide particles |
| 12/07/1992 | CA2070609A1 Process and plant for manufacturing ferric chloride aqueous solutions |
| 12/02/1992 | EP0515749A2 Process for producing acicular goethite particles and acicular magnetic iron oxide particles |
| 12/02/1992 | EP0515748A2 Process for producing acicular goethite particles and acicular magnetic iron oxide particles |
| 11/26/1992 | WO1992020834A1 Method for the desilification of aqueous inorganic solutions |
| 11/25/1992 | EP0486676A4 Process using sorbents for the removal of so x? from flue gas and other gas streams |
| 11/17/1992 | US5164007 Black pigment, process for its preparation and its use |
| 11/17/1992 | US5164005 Black manganese/iron oxide pigment a process for its production and its use |
| 11/11/1992 | CN1019001B Process for preparation of ferric chloride from dilute chlorhydric acid |
| 11/11/1992 | CN1019000B Process for synthesis of ferric chloride |
| 11/07/1992 | CA2066905A1 Process for the separation of arsenic acid from a sulfuric acid-containing solution |
| 10/21/1992 | EP0509790A2 Magnetic powder for magnetic recording and magnetic recording medium containing the same |
| 10/14/1992 | EP0508187A2 Method of treating nickel-containing etching waste fluid |
| 10/14/1992 | CN1065296A Method of treating nickel-containing etching waste fluid |
| 10/13/1992 | US5154769 Process for production of black manganese/iron oxide pigment |
| 10/13/1992 | CA1308519C Color pure iron oxide pigments, a process for their preparation and their use |
| 10/08/1992 | DE4110835A1 Verfahren zur herstellung hydrophobierter doppelschichthydroxid-verbindungen A process for preparing hydrophobicized double layer hydroxide compounds |
| 10/05/1992 | WO1992017405A1 Process for producing hydrophobised double-layer hydroxide compounds |
| 10/05/1992 | CA2107685A1 Process for producing hydrophobicized double-layer hydroxide compounds |
| 10/01/1992 | DE4209878A1 Nitrogen gas generating grains |
| 09/30/1992 | EP0360842B1 Process for producing hexaferrite powder using barium or strontium hydroxide solution |
| 09/30/1992 | CN1064853A High-purity iron oxide, and method for production thereof |
| 09/29/1992 | US5151262 Sulfiding |
| 09/23/1992 | EP0504156A1 Ferrates of alcaline or alcaline earth metals, their preparation and industrial applications. |
| 09/17/1992 | WO1992015996A1 Magnetic powder for magnetic recording and magnetic recording medium made thereof |
| 09/16/1992 | EP0503639A1 Polycristalline ferrite materials |
| 09/16/1992 | CN1064419A Layered double hydroxide sorbents for removal of sox from flue gas and other gas streams |
| 09/15/1992 | CA1307379C Process for manufacture of ferric nitrate |
| 09/09/1992 | EP0502612A2 High-purity iron oxide, and method for production thereof |
| 09/03/1992 | DE4107037A1 Redn. of trivalent iron to divalent in histological tissue sections - by treatment in ammonium polysulphide soln. adjusted to specified pH with iron-free sulphuric acid |
| 09/02/1992 | EP0500892A1 Interdispersed three-phase ferrite composite and electrographic magnetic carrier particles therefrom |
| 09/01/1992 | US5143638 Low power loss mn-zn ferrites |
| 08/26/1992 | WO1992014546A1 Synthetic spinels and processes for making them |
| 08/26/1992 | EP0499779A1 Method for treatment of waste materials |
| 08/20/1992 | WO1992013800A1 Hydroxide compounds of a certain composition, process for making them and their use |
| 08/18/1992 | US5139767 Intermittently feeding oxidizing gas into a suspension of ferrous hydroxide while controlling the oxidation rate and the feeding time period |
| 08/13/1992 | DE4103916A1 Verbindungen einer bestimmten zusammensetzung, verfahren zu deren herstellung und deren verwendung Compounds of a given composition, to processes for their preparation and their use |
| 08/12/1992 | EP0498566A1 Composite metal hydroxide and its use |