Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6780210 | Process for forming a fuel product from paper mill sludge | Samuel L. Shepherd | 2004-08-24 |
| 6221261 | Process for treating sewage using hydro fluoro ether polymers | Samuel L. Shepherd | 2001-04-24 |
| 6214064 | Process for making a fuel product from coal fines and sewage sludge | Samuel L. Shepherd | 2001-04-10 |
| 6056880 | Process for treating a waste sludge of biological solids | Samuel L. Shepherd | 2000-05-02 |
| 5868942 | Process for treating a waste sludge of biological solids | Samuel L. Shepherd | 1999-02-09 |
| 5635069 | Process for treating a waste sludge of biological solids | Samuel L. Shepherd | 1997-06-03 |