|
| US4142867 | 27 Sep 1976 | 6 Mar 1979 | | Apparatus for the production of combustible gas |
| US4159306 | 15 Feb 1977 | 26 Jun 1979 | | Apparatus for the production of activated carbon |
| US4351702 | 8 Sep 1981 | 28 Sep 1982 | Conoco Inc. | Processing of heavy high-sulfur feedstocks |
| US6149773 | 13 Dec 1996 | 21 Nov 2000 | Waste Gas Technology Limited | Generation of electricity from waste material |