| Patents for C01G 35 - Compounds of tantalum (1,004) |
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| 12/31/1991 | US5076901 Method of manufacturing perovskite lead scandium tantalate |
| 12/11/1991 | EP0460726A1 Formation of potassium tantalate niobate thin films by metallorganic deposition |
| 12/10/1991 | US5072031 Layered divalent metal phosphates containing pendent substituent groups and their preparation |
| 12/05/1991 | CA2042083A1 Formation of potassium tantalate niobate thin films by metalorganic deposition |
| 11/26/1991 | US5068097 Free-flowing, controlled particle size |
| 10/17/1991 | WO1991015426A1 NEW COMPOUND OF THE K-Nb-Si-O SYSTEM AND ITS DERIVATIVES, PROCESS FOR SYNTHESISING THEM AND THEIR APPLICATIONS, IN PARTICULAR IN OPTICS |
| 09/24/1991 | US5051280 Forming a salt of an alkali metal and a complex of niobium or tantalum followed by pyrolysis |
| 08/06/1991 | CA1287285C Method for flocculating suspensions containing swelled layered chalcogenide |
| 07/09/1991 | US5030601 Process for the production of sinterable zirconium oxide powder |
| 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 |
| 05/14/1991 | US5015461 Hydrorefining catalysts of niobium, tantalum and a divalent metal |
| 04/30/1991 | CA1283523C Method of purifying tantalum |
| 04/09/1991 | CA1282574C Forms of transition metal dichalcogenides |
| 02/26/1991 | US4996108 Sheets of transition metal dichalcogenides |
| 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 |
| 12/14/1990 | WO1990015775A1 Method of hydrolyzing metal halides |
| 12/14/1990 | CA2034004A1 Method of hydrolyzing metal halides |
| 11/14/1990 | EP0396703A1 A method for the production of thin film perovskite phase lead scandium tantalate |
| 11/14/1990 | CN1046879A Sintered zirconium oxide powder and the preparation thereof |
| 11/07/1990 | EP0395912A1 Sinterable zirconium oxide powder and process for its preparation |
| 10/09/1990 | US4962228 Catalysts, catalyst supports |
| 10/04/1990 | WO1990011249A1 Method of obtaining complex oxides |
| 08/16/1990 | EP0382339A1 Sheets of transition metal dichalcogenides |
| 08/14/1990 | US4948570 Process for lowering residual tantalum values in niobium |
| 07/17/1990 | US4942024 Method for refining hydroxides of niobium and tantalum containing transition metals |
| 07/10/1990 | US4940897 Single crystals of lithium tantalate dispersed in glass binder |
| 05/17/1990 | WO1990005202A1 A method for the production of thin film perovskite phase lead scandium tantalate |
| 05/02/1990 | EP0365645A1 A method of manufacturing perovskite lead scandium tantalate. |
| 04/17/1990 | US4918035 Process for the preparation of complex perovskite type compounds |
| 04/10/1990 | EP0341266A4 Superconductivity in square-planar compound systems. |
| 03/22/1990 | WO1990002823A1 IMPROVED PROCESS FOR OBTAINING IMPURITY-FREE COMPOUNDS OF Ta AND/OR Nb FROM MATERIALS CONTAINING THESE METALS |
| 12/06/1989 | EP0344670A1 Pyroelectric sensor |
| 11/15/1989 | EP0341266A1 Superconductivity in square-planar compound systems. |
| 11/02/1989 | WO1989010335A1 A method of manufacturing perovskite lead scandium tantalate |
| 09/26/1989 | CA1261589A1 Predetermined and enhanced densification in sintered metal oxides |
| 09/06/1989 | EP0330698A1 PROCESS FOR PURIFYING (Nb1-xTax)2O5 AND THE PREPARATION OF KNb1-xTaxO3-CRYSTALS THEREFROM |
| 08/01/1989 | US4853359 Separated by alkali metal layer; |
| 08/01/1989 | US4853199 Method for producing crystalline complex perovskite compounds |
| 07/11/1989 | US4846853 Layered divalent metal hydrogen phosphates |
| 04/18/1989 | US4822590 Forms of transition metal dichalcogenides |
| 03/09/1989 | WO1989001914A1 PROCESS FOR PURIFYING (Nb1-xTax)2O5 AND THE PREPARATION OF KNb1-xTaxO3-CRYSTALS THEREFROM |
| 12/14/1988 | EP0294991A2 Readily sinterable powder of perovskite type oxide containing group Va element and laminated element obtained therefrom |
| 11/02/1988 | EP0288638A1 Method for flocculating suspensions containing swelled layered chalcogenide |
| 09/14/1988 | EP0282218A2 Layered divalent metal compositions |
| 09/07/1988 | EP0280812A1 Superconductivity in square - planar compound systems |
| 08/10/1988 | CN87107765A Super conductivity in squar-planar compound systems |
| 07/20/1988 | EP0275151A2 Method for producing crystalline complex perovskite compounds |
| 07/14/1988 | WO1988005029A1 Superconductivity in square-planar compound systems |
| 07/12/1988 | US4756901 Contacting with hydrochloric, hydrobromic, hydroiodic acid to extract impurities |
| 05/03/1988 | US4741894 Method of producing halide-free metal and hydroxides |
| 03/15/1988 | US4731198 Positively charged antimony pentoxide sol and preparation thereof |
| 03/01/1988 | US4728439 Ion exchange |
| 01/07/1988 | EP0251432A2 Method of producing halide-free metal oxides |
| 01/05/1988 | CA1230975A1 Process for dissolving tantalum/columbium materials containing alkali metal impurities |
| 12/17/1987 | WO1987007650A1 Target made of highly pure metallic tantalum and process for its production |
| 11/19/1987 | EP0245670A2 Transition metal dichalcogenide compounds |
| 11/17/1987 | US4707820 Optical film and process for producing same |
| 10/28/1987 | EP0242804A2 Novel transition metal dichalcogenide catalysts |
| 10/14/1987 | EP0241278A2 Method of separating and purifying tantalum and niobium-containing compounds |
| 09/16/1987 | EP0237081A2 Process for the preparation of complex perovskite type compounds |
| 06/16/1987 | US4673554 Method of purifying tantalum |
| 06/03/1987 | EP0224209A2 Process for recovery of rare metals |
| 05/26/1987 | US4668653 Method for the incorporation of metals into high temperature antimony oxide |
| 05/05/1987 | US4663130 Process for dissolving tantalum/columbium materials containing alkali metal impurities |
| 10/15/1986 | EP0197503A2 Positively charged antimony pentoxide sol and preparation thereof |
| 09/16/1986 | CA1211289A1 Direct niobium and tantalum extraction contained in the leaching pulp of a pyrochlore concentrate |
| 06/25/1986 | EP0185550A2 Method of purifying tantalum |
| 05/20/1986 | CA1204588A1 Method for doping tin oxide |
| 04/15/1986 | US4582571 Separation of tantalum or antimony pentafluoride from isobutyryl fluoride and anhydrous hydrogen fluoride |
| 10/22/1985 | US4548741 With tantalum and niobium, thick film resistors |
| 08/27/1985 | US4537750 Solubilizing with hydrofluoric acid, precipitating, dissolving with oxalic acid, digesting in hydrofluoric acid and separating |
| 01/22/1985 | US4495158 Process for the recovery of tantalum values |
| 12/25/1984 | US4490340 Process for the recovery of high purity tantalum oxide |
| 12/18/1984 | US4489171 Tantalum (V) halide/oxide-metal oxide compositions and a process for their preparation |
| 05/01/1984 | US4446115 Hydrofluoric acid, ion exchange resin |
| 12/07/1983 | EP0095775A1 Compositions for conductive resistor phases and methods for their preparation including a method for doping tin oxide |
| 09/06/1983 | US4402924 Preparation of high surface area metal fluorides and metal oxyfluorides, especially aluminum fluoride extrudates |
| 04/12/1983 | CA1144376A1 Leaching process for niobium and (or) tantalum minerals |
| 02/01/1983 | US4371419 Method for producing a lithium tantalate single crystal |
| 01/26/1983 | EP0070642A1 A method and apparatus for producing tantalum pentoxide |
| 12/01/1982 | EP0065863A2 Method of producing ceramic-forming metal hydroxide and oxide powders |
| 01/05/1982 | US4309389 Pyrohydrolysis of fluoro acid complexes |
| 12/09/1981 | EP0041459A1 Process for the lixiviation of a niobium and/or tantalum ore containing calcium as main impurity |
| 11/24/1981 | US4302243 Process for producing tantalum concentrates |
| 09/08/1981 | CA1108377A1 Preparation of high surface area metal fluorides and metal oxyfluorides, especially aluminum fluoride extrudates |
| 08/26/1981 | EP0034348A1 Method of and apparatus for recovering tantalum from tantalum-containing scrap |
| 06/23/1981 | US4275046 By reaction of a metal oxide with a fluorocarbon vapor |
| 04/08/1980 | US4196963 Method for eliminating Li2 O out-diffusion in LiNbO3 and LiTaO3 waveguide structures |
| 01/22/1980 | CA1070083A1 Lewis acid-fluorine compounds of carbon |
| 10/23/1979 | US4172115 Dehydration, desulfurization |
| 03/13/1979 | US4144117 Method for producing a lithium tantalate single crystal |
| 01/23/1979 | US4135963 Lithium tantalate single crystal growth from a platinum-rhodium crucible in an inert gas, nitrogen or reducing gas atmosphere |
| 12/05/1978 | US4128499 Lewis acid-fluorine compounds of carbon |
| 11/21/1978 | CA1042772A1 Method of etching and polishing a surface of a substrate comprising litao3 linbo3 |
| 11/07/1978 | US4124692 Tantalum fluoride by dehydrating mixture of water and fluorotantalic acids |
| 08/22/1978 | US4108970 Process for producing lithium niobate and lithium tantalate |