Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7842107 | Method and apparatus for thermally upgrading carbonaceous materials | Robert F. Hogsett, Michael F. Ray, Michael Schlegel, Sheldon Schultz | 2010-11-30 |
| 7198655 | Method and apparatus for thermally upgrading carbonaceous materials | Robert F. Hogsett, Michael F. Ray, Michael Schlegel, Sheldon Schultz | 2007-04-03 |
| 4764184 | Apparatus for the gasification of coal | — | 1988-08-16 |
| 4643109 | Gasification of coal | — | 1987-02-17 |
| 4615713 | Ash temperature measurement means for a fixed bed gasifier | — | 1986-10-07 |