Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769908 | Method and apparatus for reducing the by-product content of carbonaceous materials | — | 1998-06-23 |
| 5746787 | Process for treating carbonaceous materials | — | 1998-05-05 |
| 5290523 | Method and apparatus for upgrading carbonaceous fuel | — | 1994-03-01 |
| 5071447 | Apparatus and process for steam treating carbonaceous material | — | 1991-12-10 |
| 4728339 | Multiple hearth apparatus and process for thermal treatment of carbonaceous materials | — | 1988-03-01 |
| 4626258 | Multiple hearth apparatus and process for thermal treatment of carbonaceous materials | — | 1986-12-02 |
| 4477257 | Apparatus and process for thermal treatment of organic carbonaceous materials | Robert G. Murray | 1984-10-16 |
| 4330032 | Self-cleaning screw conveyor | Robert G. Murray | 1982-05-18 |
| 4220458 | Filter apparatus | Robert G. Murray, Charles E. Lapple, A. K. V. Subba Rao | 1980-09-02 |