| Application number | Title of the application | Filing Date | Status |
|---|
| 07/733969 | REFINING OF RAW GAS | Jul 21, 1991 | Abandoned |
| 07/727646 | PROCESS FOR THE ALLOTHERMIC GASIFICATION OF COAL AND FLUIDIZED BED GAS GENERATOR TO CARRY OUT THE PROCESS | Jul 8, 1991 | Abandoned |
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