|
| US4406773 | 13 May 1981 | 27 Sep 1983 | Ashland Oil, Inc. | Magnetic separation of high activity catalyst from low activity catalyst |
| US4411766 | 25 Feb 1982 | 25 Oct 1983 | Air Products and Chemicals, Inc. | Iron catalyzed coal liquefaction process |
| US4421635 | 12 Feb 1982 | 20 Dic 1983 | Research Association for Residual Oil Processing | Process for simultaneously cracking heavy hydrocarbons into light oils and producing hydrogen |
| US5147527 | 3 Abr 1989 | 15 Sep 1992 | Ashland Oil, Inc. | Magnetic separation of high metals containing catalysts into low, intermediate and high metals and activity catalyst |
| US7772424 | 1 Mar 2006 | 10 Ago 2010 | Eastman Chemical Company | Polycarboxylic acid production system employing enhanced evaporative concentration downstream of oxidative digestion |
| US7816556 | 1 Mar 2006 | 19 Oct 2010 | Eastman Chemical Company | Polycarboxylic acid production system employing enhanced multistage oxidative digestion |
| US7829037 | 29 Ago 2007 | 9 Nov 2010 | Eastman Chemical Company | Oxidation system with sidedraw secondary reactor |
| US8153840 | 22 Feb 2010 | 10 Abr 2012 | Grupo Petrotemex, S.A. de C.V. | Oxidation system with sidedraw secondary reactor |
| US8211224 | 31 Oct 2007 | 3 Jul 2012 | Sun Chemical Corp. | Multi-colored lustrous pearlescent pigments and process for making |
| US8221536 | 31 Oct 2007 | 17 Jul 2012 | Sun Chemical Corp. | Cosmetic comprising multi-colored lustrous pearlescent pigments |