Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6638354 | Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes | Douglas K. Stephens, Clyde W. Wellen, Jeffrey B. Smith | 2003-10-28 |
| 6375735 | Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes | Douglas K. Stephens, Clyde W. Wellen, Jeffrey B. Smith | 2002-04-23 |
| 4885417 | Method for the decoloration of chloro-xylene compositions | — | 1989-12-05 |