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| Patents for C01F 1 - Methods of preparing compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or the rare earths, in general (321) |
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| 06/05/1991 | EP0429548A1 Small sized alpha alumina particles and platelets. | | 01/22/1991 | CA1279157C Process for causticizing of an aqueous solution containing alkali carbonate | | 12/27/1990 | WO1990015777A1 Small sized alpha alumina particles and platelets | | 11/13/1990 | US4970191 Mixing acid, pseudoboehmite, and magnesium oxide or hydroxide; agitation, drying, and roasting | | 10/31/1990 | EP0395243A2 Inorganic particles | | 10/27/1990 | CA2015454A1 Inorganic particles | | 10/19/1990 | WO1990012645A1 Basic mixed oxide | | 04/18/1990 | EP0363435A1 Improved process for making superconductors. | | 03/22/1990 | EP0363435A4 Improved process for making superconductors. | | 01/10/1990 | EP0350344A1 Layered intercalated metal oxides, and process for their preparation | | 11/15/1989 | EP0341274A1 Process for the preparation of metal oxide powders. | | 07/11/1989 | US4847064 Bayer process, roasting | | 04/06/1989 | WO1989002871A1 Process for the preparation of metal oxide powders | | 02/22/1989 | CN1031296A Improved process for making 90k superconductors | | 12/15/1988 | WO1988010009A1 Improved process for making superconductors | | 11/03/1988 | DE3813454A1 Verfahren zur herstellung von anorganischen metallverbindungen mit ultrahoher reinheit Process for the preparation of inorganic metal compounds with ultra-high purity | | 02/28/1984 | US4434057 Water purification utilizing plural semipermeable membrane stages | | 04/06/1983 | EP0075836A2 Process for recovering magnesium | | 01/08/1980 | CA1069276A1 Operating method | | 10/24/1978 | CA1040866A1 Refining of chloride salts | | 04/18/1978 | US4084545 Operating method |
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