|
| US4203830 | 28 Ago 1978 | 20 May 1980 | Mobil Oil Corporation | Visbreaking process for demetalation and desulfurization of heavy oil |
| US4306959 | 11 Feb 1980 | 22 Dic 1981 | Conoco Inc. | Use of chelating agents in the conversion of coal to low mineral content fuel |
| US4405825 | 30 Oct 1981 | 20 Sep 1983 | Union Oil Company of California | Pour point reduction of syncrude |
| US4613726 | 27 Jun 1985 | 23 Sep 1986 | Institut Francais du Petrole | Process for removing nickel, aluminum and chlorine from olefin oligomers |
| US4773988 | 23 Sep 1986 | 27 Sep 1988 | Union Oil Company of California | Arsenic removal from shale oil by addition of basic materials |
| US7556715 | 16 Abr 2004 | 7 Jul 2009 | Suncor Energy, Inc. | Bituminous froth inline steam injection processing |
| US7914670 | 29 Jun 2009 | 29 Mar 2011 | Suncor Energy Inc. | Bituminous froth inline steam injection processing |
