Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4925923 | Lignin having chemically bound sulfur and phosphorus groups mainly as thiophosphate, using phosphorus pentasulfide | Manssur Yalpani | 1990-05-15 |
| 4857638 | Lignin having nitrogen and sulfur and process therefor employing thiourea | Manssur Yalpani | 1989-08-15 |