Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4455435 | Method for the preparation of Leuco Crystal Violet Lactone | Erwin Klingsberg | 1984-06-19 |
| 4210601 | Process for preparing aryl[4,4'-bis(di-loweralkyl-amino)benzhydryl]sulfones | Erwin Klingsberg, John H. Bright | 1980-07-01 |