| Patents for C01G 27 - Compounds of hafnium (508) |
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| 05/19/1992 | CA1300870C Barium titanate coforms |
| 04/21/1992 | CA1298955C Continuous process for production of fine particulate ceramics |
| 04/07/1992 | US5102637 Method of purifying zirconium tetrachloride and hafnium tetrachloride in a vapor stream |
| 02/11/1992 | US5087437 Process for preparing crystalline mixed metal oxides |
| 09/17/1991 | US5049371 Process for the preparation of monodisperse ceramic powders |
| 06/26/1991 | EP0434222A1 Ultra high purity metal fluorides and their preparation |
| 06/18/1991 | US5024859 Method for applying an oxide barrier coating to a reinforcing fiber |
| 05/23/1991 | DE4036386A1 Coating reinforcing fibre - with oxide barrier coating, used in ceramic matrix composite material |
| 05/21/1991 | US5017534 Method for the fabrication of a ceramic material by hybrid chemical process and material obtained thereby |
| 05/21/1991 | CA2025318A1 Coated reinforcing fiber and method for applying an oxide barrier coating |
| 04/23/1991 | US5009866 Fused salt process for purifying zirconium and/or hafnium tetrachlorides |
| 04/23/1991 | US5009751 Process for separation of hafnium tetrachloride from zirconium tetrachloride |
| 01/08/1991 | US4983373 Process for the production of high purity zirconium tetrafluoride and other fluorides |
| 11/20/1990 | US4971933 Alloy, ceramic composites |
| 11/20/1990 | US4971734 Method of making nuclear fuel pellets, comprising producing and using pourable, frittable powders obtained directly by precipitation of peroxides |
| 11/06/1990 | CA1275783C Preparation of unagglomerated metal oxide particles with uniform particle size |
| 10/23/1990 | US4965055 Preparation of ultra-pure metal halides |
| 09/12/1990 | EP0386174A1 Ultra high purity halides and their preparation |
| 08/22/1990 | EP0180900B1 Process for the adjustment of the structure and/or surface characteristics of oxidized materials |
| 05/30/1990 | EP0370480A1 Process for the production of high purity zirconium tetrafluoride and other fluorides |
| 05/16/1990 | CN1007965B Composite porous matercal, process for production and separation of metallic |
| 05/15/1990 | US4925537 Process for separation of hafnium tetrachloride from zirconium tetrachloride and electrode |
| 04/17/1990 | US4917773 Process for introducing zirconium tetrachloride, hafnium tetrachloride and mixtures thereof into a column for the continuous extractive distillation under pressure of said chlorides |
| 04/03/1990 | US4913884 Uranium-preextraction in zirconium/hafnium separations process |
| 04/03/1990 | US4913778 Molten salt scrubbing of zirconium or hafnium tetrachloride |
| 03/28/1990 | EP0360649A1 Process for the preparation of a ceramic material in the hybrid chemical way, and material obtained |
| 03/20/1990 | US4910009 Ultra high purity halides and their preparation |
| 02/20/1990 | US4902655 Fluidized bed chlorination of rare earth ore, separation of yttrium chloride as by-product |
| 01/17/1990 | EP0351334A1 Process for manufacturing nuclear fuel pellets comprising the production and the use of flowable and frittable powders directly obtained by precipitating peroxides |
| 01/16/1990 | US4894357 Process for adjusting the structural and/or surface character of oxides |
| 11/16/1989 | WO1989010897A1 Ultra high purity halides and their preparation |
| 11/02/1989 | EP0340119A1 Process and apparatus for the continuous, pressurized introduction of zirconium tetrachloride, hafnium tetrachloride or their mixtures to an extractive distillation column |
| 11/01/1989 | CN1036706A Method of introduction of zirconium tetrachloride hafnium tetrachloride and mixture of them into distilling column for continuous extraction of said chlorides under pressure |
| 10/17/1989 | US4874559 Feeding at flow rate above minimum |
| 10/17/1989 | US4874475 Using alkali(earth) chlorides as solvent |
| 10/10/1989 | US4873072 Recovery of hafnium values from loaded extraction solvent |
| 09/12/1989 | US4865696 Recovery of metal chlorides from their complexes by molten salt displacement |
| 09/12/1989 | US4865695 Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride |
| 09/12/1989 | US4865694 Distillation |
| 09/12/1989 | US4865693 Preparation of complexes of zirconium and hafnium tetrachlorides with phosphorus oxychloride |
| 09/05/1989 | US4863883 Barium titanate powders, spheres, capacitors |
| 08/15/1989 | US4857155 Process of separation of hafnium from zirconium by molten salt electrolysis |
| 08/09/1989 | EP0205454B1 Process for the preparation of ultrapure active metal fluorides |
| 07/19/1989 | EP0324619A1 Improved process for preparing crystalline mixed metal oxides |
| 07/19/1989 | CN1033977A Doped batio3 based compositions |
| 07/04/1989 | US4845056 Continuous process for production of fine particulate ceramics |
| 05/09/1989 | US4829033 Narrow particle size distribution |
| 05/03/1989 | EP0314166A1 Process for the production of monodisperse ceramic powders |
| 04/20/1989 | WO1989003365A1 Continuous process for production of fine particulate ceramics |
| 02/23/1989 | DE3826801A1 Dotierte zusammensetzung auf der basis von batio(pfeil abwaerts)3(pfeil abwaerts) Doped composition on the basis of BaTiO (down arrow) 3 (down arrow) |
| 12/01/1988 | WO1988009307A1 Method for producing a fine powder of metal oxide (zirconium, hafnium, titanium) having a specific surface or a predetermined grain size |
| 11/01/1988 | USRE32777 Chlorination, bromination or iodination of metal, fluorination |
| 10/18/1988 | US4778671 Preparation of unagglomerated metal oxide particles with uniform particle size |
| 08/16/1988 | US4764352 Process for preventing the extraction of technetium and/or rhenium, particularly during the extraction of uranium and/or plutonium by an organic solvent |
| 06/29/1988 | CN87104006A Barium titanate coforms |
| 06/21/1988 | US4752454 Heating hydrated fluoride of zirconium, thorium, hafnium, ytterium, scandium or rare earth metal in reactive vapors of hydrofluoric acid, carbon dioxide and a fluoroalkane |
| 06/07/1988 | US4749448 Reduced solvent viscosity; low temperature stripping, corrosion resistance, minimal carryover |
| 04/12/1988 | US4737244 Zirconium and hafnium tetrachloride separation by extractive distillation with molten zinc chloride lead chloride solvent |
| 03/22/1988 | US4732887 Resin in voids for chromatography |
| 01/20/1988 | EP0253552A2 Preparation of unagglomerated metal oxide particles with uniform particle size |
| 11/12/1987 | DE3714819A1 Cosynthetisierte zusammensetzungen auf der basis von bariumtitanat Cosynthetisierte compositions based on barium titanate |
| 04/07/1987 | US4655967 Baking a titanate and a group 5 metal compound, antistatic agent |
| 03/31/1987 | US4654048 Metal oxide or carbide, salts, emulsification, immiscibility, microdrops, drying, heat treatment |
| 03/24/1987 | US4652438 Chemical vapor purification of fluorides |
| 03/10/1987 | US4649030 Solvent extraction; sulfuric acid; alkali metal, thallium or ammonium sulfate |
| 02/17/1987 | US4643984 Process for producing a composition which includes perovskite compounds |
| 01/14/1987 | EP0208586A1 Process to prevent extraction of technetium and/or rhenium, particularly in case of the extraction of uranium and/or plutonium by means of an organic solvent |
| 01/13/1987 | US4636378 Method of preparation of perovskite-type compounds |
| 12/30/1986 | EP0205454A1 Process for the preparation of ultrapure active metal fluorides. |
| 07/17/1986 | WO1986004048A1 Process for the preparation of ultrapure active metal fluorides |
| 07/01/1986 | US4597786 Purifying process of fluoride glass |
| 06/10/1986 | CN85108961A Composite porous material, process for production and sepparation of metallic element |
| 06/10/1986 | CN85103713A Liquid-solid-activator method for deodorizing light oils |
| 05/14/1986 | EP0180900A2 Process for the adjustment of the structure and/or surface characteristics of oxidized materials |
| 03/25/1986 | US4578252 Method for preparing ultra-pure zirconium and hafnium tetrafluorides |
| 03/25/1986 | US4578165 Process for separation of zirconium from hafnium |
| 12/27/1985 | EP0165549A2 Electrically conductive titanate derivative and process for preparing the same |
| 09/11/1985 | EP0154448A2 Process for recovery of zirconium by solvent extraction |
| 07/18/1985 | WO1985003014A1 Method for preparing a powder suitable for sintering |
| 07/03/1985 | EP0147327A2 Process for the preparaton of a powder suitable to be sintered |
| 05/22/1985 | EP0142291A1 Process for separation of zirconium from hafnium |
| 10/31/1984 | EP0123634A1 Process for separating zirconium tetrachloride from hafnium tetrachloride by extractive distillation for the removal of the aluminium introduced by the solvent |
| 07/31/1984 | CA1171664A1 Process for separation of zirconium- and hafnium tetrachlorides from a mixture comprising such chlorides and apparatus therefor |
| 05/29/1984 | US4451445 Method for controlled hydrogen charging of metals |
| 01/31/1984 | US4428770 Methods of manufacturing metal from a melt, determination of sulfur and carbon therein, sensors therefor and solid electrolyte compositions for said sensors |
| 08/31/1983 | EP0087322A1 Methods for the determination of sulphur and carbon in fluids |
| 01/11/1983 | US4368072 Iodide cell vapor pressure control |
| 07/20/1982 | CA1127990A1 Process for treating sour petroleum distillates |
| 05/25/1982 | CA1124197A1 Process for treating sour petroleum distillates |
| 02/03/1982 | EP0045270A1 Process for separation of zirconium- and hafnium tetrachlorides from a mixture comprising such chlorides and apparatus therefor |
| 12/08/1981 | CA1113689A1 Method for superheating gases |
| 03/17/1981 | US4256463 Preparation of zirconium oxychloride |
| 01/27/1981 | CA1094291A1 Commercial production of transition metal sulfides from their halides |
| 11/04/1980 | US4231994 Separation of zirconium from hafnium by solvent extraction |
| 06/17/1980 | US4208394 Reaction with carbon disulfide |
| 05/20/1980 | US4203827 Process for treating sour petroleum distillates |
| 05/13/1980 | US4202862 By controlling temperature and ph |
| 07/10/1979 | CA1057933A1 Hafnium-titanium-calcium-oxygen product |
| 07/03/1979 | US4160118 Method and apparatus for superheating gases |
| 06/05/1979 | US4157312 Catalytic composite particularly useful for the oxidation of mercaptans contained in a sour petroleum distillate |