Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302403 | Process for reacting sulfuric acid and an aromatic hydrocarbon to purify a disulfonic acid product of an aromatic hydrocarbon | Hans Dressler, Frederick M. Covelli | 1981-11-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4302403 | Process for reacting sulfuric acid and an aromatic hydrocarbon to purify a disulfonic acid product of an aromatic hydrocarbon | Hans Dressler, Frederick M. Covelli | 1981-11-24 |