| Patents for C01G 33 - Compounds of niobium (1,435) |
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| 02/16/1995 | CA2146539A1 Metal oxide powder and method for the production of the same |
| 01/19/1995 | DE4405411C1 Process for preparing a sol for the production of a PZT or a PMNT ceramic |
| 01/03/1995 | US5378400 Preparation of metal oxide sols by electrolysis |
| 12/22/1994 | DE4339401C1 Process for producing a layer structure and its use |
| 12/13/1994 | US5372796 Reacting a metal alkoxide with a substoichiometric amount of an acid in the presence of an oxide particle growth terminator and solubilizer |
| 11/22/1994 | US5366718 Process for producing columbite-type niobate and process for producing perovskite-type compound therefrom |
| 10/27/1994 | WO1994024052A1 Metal oxide-polymer composites |
| 10/27/1994 | CA2135935A1 Metal oxide-polymer composites |
| 10/18/1994 | US5356120 Device for producing finely-divided metal and ceramic powder |
| 08/17/1994 | CN1025669C Process for preparing niobium oxide powder |
| 06/22/1994 | EP0439620B1 Method of producing pulverized perovskite compound |
| 05/17/1994 | US5312612 Polymorphous luminescent compositions |
| 05/17/1994 | CA1329486C Process for recovery of rare metals |
| 05/11/1994 | WO1994010084A1 Precursors and processes for making metal oxides |
| 05/11/1994 | CA2145878A1 Precursors and processes for making metal oxides |
| 04/26/1994 | US5306479 Process for synthesizing niobium dioxide and mixed metal oxides containing niobium |
| 04/13/1994 | EP0591459A1 Process of making metal oxides |
| 03/23/1994 | EP0587672A1 Method of producing nanometer-sized oxide particles. |
| 03/22/1994 | US5296203 Recovery of niobium from irradiated targets |
| 02/22/1994 | US5288474 Process for the production of lead metal niobates |
| 02/02/1994 | EP0580974A1 Metal niobates and/or tantalates, process for their preparation and their use |
| 01/20/1994 | WO1994001190A1 Recovery of metal values from process residues |
| 01/20/1994 | CA2139642A1 Recovery of metal values from process residues |
| 01/19/1994 | EP0330698B1 PROCESS FOR PURIFYING (Nb1-xTax)2O5 AND THE PREPARATION OF KNb1-xTaxO3-CRYSTALS THEREFROM |
| 12/29/1993 | EP0575745A1 Process for the preparation of lead-metal-niobates |
| 12/15/1993 | EP0573818A1 Process for the production of lead perovskites |
| 11/18/1993 | EP0569765A1 Apparatus for manufacturing fine metal and ceramic powder |
| 11/11/1993 | DE4214719A1 Metallic and/or ceramic powders - produced by gas phase reaction (CVR) of metallic cpds. plus other named reactants in tubular reactor have narrow, predetermined size range and high purity |
| 11/09/1993 | CA2003860C Rechargeable non-aqueous cell |
| 09/16/1993 | WO1993017959A1 Production of transparent cationically homogeneous refractory oxides of nanometer-scale particle size diameters at reduced temperatures |
| 09/07/1993 | US5242674 Process for preparing crystalline mixed metal oxides |
| 07/20/1993 | US5229101 Containing lead and niobium |
| 06/16/1993 | EP0546871A1 Process for the preparation of fergusonites and the obtained products |
| 06/09/1993 | EP0545775A1 Perovskites on the basis of tantalum or niobium and process for its preparation |
| 06/09/1993 | EP0545135A1 Production of sols of metal oxides by electrolysis |
| 06/07/1993 | CA2084628A1 Tentalum- or niobium-based perovskites and process for their preparation |
| 06/02/1993 | EP0543909A1 Preparation of anhydrous niobium and tantalum pentafluorides. |
| 06/02/1993 | CN1072740A Preparation of metal oxide sols by electrolysis |
| 05/31/1993 | CA2084024A1 Preparation of metal oxide sols by electrolysis |
| 05/18/1993 | US5211921 From alloy |
| 05/11/1993 | US5209910 Digestion with hydrofluoric acid, solvent extraction with methyl isobutyl ketone |
| 04/28/1993 | EP0386205B1 Improved process for obtaining impurity-free compounds of ta and/or nb from materials containing these metals |
| 04/13/1993 | US5201989 Anisotropic niobium pentoxide etch |
| 03/16/1993 | US5194232 Washing hydroxide precipitates with dilute ammonia and water in two stages |
| 03/02/1993 | US5190735 Radioactive isotopes |
| 02/23/1993 | US5188810 Hydriding iron or nickel alloy, comminuting, carbiding, leaching with acid, oxidizing |
| 01/19/1993 | US5180699 Lead-niobium-metal oxide ceramic produced from a niobic acid sol |
| 01/07/1993 | WO1993000296A1 Process for making niobium oxide |
| 01/07/1993 | WO1993000292A1 Process of making niobium oxide |
| 12/10/1992 | DE4118185A1 Verfahren zur herstellung nanoskaliger oxidteilchen Process for the preparation of nanoscale oxide particles |
| 11/24/1992 | CA2069266A1 Layer-type transition metal dichalcogenide with house-of-cards structure |
| 10/12/1992 | WO1992021611A1 Method of producing nanometer-sized oxide particles |
| 10/06/1992 | US5153154 Composed of lead oxide, magnesium oxide, niobium oxide and calcium oxide; resonators |
| 07/30/1992 | DE4102328A1 Pyrogenic niobium oxide - useful for prodn. of catalysts, ceramics and glass |
| 07/21/1992 | CA1305516C Non-aqueous cell comprising niobium triselenide |
| 07/01/1992 | EP0493242A1 Reduced compounds, in particular on the basis of titanium, vanadium, niobium and especially of the tianite type, and their preparation |
| 07/01/1992 | EP0493241A1 Reduced titanium, vanadium or niobium-base compounds, particularly of titanite type, and process of preparation thereof |
| 06/23/1992 | US5124777 Of strontium, barium, lanthanum and niobium oxides, crystal structure |
| 05/27/1992 | CN1016773B Layered silicates and their synthesis |
| 05/27/1992 | CN1016772B Layered metal oxides containing interlayer oxides and their synthesis |
| 05/27/1992 | CN1016771B Layered metal chalcogenides containing interspathic polymeric chalcogenides |
| 05/20/1992 | CN1016677B Method for preparation of layered metal oxides containing interlayer oxides |
| 05/12/1992 | US5112433 Precipitation of hydroxides, slurrying, adding oxides or hydroxides to adjust composition, hydrothermal treatment |
| 04/14/1992 | US5105053 Catalytic oxidative dehydrogenation of light hydrocarbons to form heavier hydrocarbons |
| 04/08/1992 | EP0479162A1 Low temperature synthesis of alkali metal niobates and tantalates |
| 04/07/1992 | US5102649 Reacting strong acid, hydrogen peroxide, and niobium compound |
| 04/02/1992 | CA2051519A1 Low temperature synthesis of alkali metal niobates and tantalates |
| 03/17/1992 | US5096642 Process for producing a high density ceramic of perovskite |
| 03/11/1992 | CN1059320A Preparation of anhydrous niobium and tantalum pentafluorides |
| 03/05/1992 | WO1992003382A1 Preparation of anhydrous niobium and tantalum pentafluorides |
| 02/25/1992 | US5091168 Preparation of anhydrous niobium and tantalum pentafluorides |
| 02/11/1992 | US5087437 Process for preparing crystalline mixed metal oxides |
| 01/28/1992 | US5084253 Method of removing niobium from uranium-niobium alloy |
| 01/14/1992 | US5080880 Niobium Pentachloride, Niobium Pentoxide, Hydrochloric Acid |
| 12/10/1991 | US5072031 Layered divalent metal phosphates containing pendent substituent groups and their preparation |
| 10/09/1991 | CN1014233B Oligomerization of olefins |
| 09/24/1991 | US5051280 Forming a salt of an alkali metal and a complex of niobium or tantalum followed by pyrolysis |
| 08/13/1991 | CA1287612C Layered metal chalcogenides containing interlayer chalcogenides and their synthesis |
| 08/13/1991 | CA1287611C Layered metal oxides containing interlayer oxides and their synthesis |
| 08/07/1991 | EP0439620A1 Method of producing pulverized perovskite compound |
| 07/30/1991 | US5036027 Niobium-lanthanum-boron composition, printed circuits |
| 06/26/1991 | EP0433450A1 Method of obtaining complex oxides |
| 06/11/1991 | US5023059 Recovery of metal values and hydrofluoric acid from tantalum and columbium waste sludge |
| 06/05/1991 | EP0429638A1 Method of hydrolyzing metal halides |
| 05/22/1991 | EP0428388A1 Process for producing peroxoniobic acid sol |
| 05/22/1991 | EP0428387A2 Process for producing powder material for lead perovskite ceramic |
| 05/14/1991 | US5015461 Hydrorefining catalysts of niobium, tantalum and a divalent metal |
| 04/30/1991 | CA1283647C Layered silicates and their synthesis |
| 04/30/1991 | CA1283646C Layered metal oxides containing interlayer oxides and their synthesis |
| 03/07/1991 | WO1991002697A1 Method of producing pulverized perovskite compound |
| 02/26/1991 | US4996108 Sheets of transition metal dichalcogenides |
| 02/19/1991 | US4994421 Transparent, uniform particle sizes |
| 02/05/1991 | US4990324 Method for producing two-component or three-component lead zirconate-titanate |
| 01/23/1991 | EP0409339A1 Potassium-lithium niobate crystals |
| 01/16/1991 | EP0408218A1 Process for lowering residual tantalum values in niobium |
| 01/02/1991 | EP0405891A2 High surface area oxide compositions and their use in the conversion of light hydrocarbons |
| 12/26/1990 | CA2018515A1 High surface area oxide compositions with a pyrochlore structure, methods for their preparation and, conversion processes utilizing same |
| 12/19/1990 | EP0402687A1 Niobium oxide powder (Nb205) and process for its preparation |
| 12/19/1990 | CN1047842A Niobium oxide powder and process for its preparation |
| 12/14/1990 | WO1990015775A1 Method of hydrolyzing metal halides |