Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5312976 | Process for the preparation of 2-hydroxy-naphthalene-6-carboxylic acid | Siegbert Rittner | 1994-05-17 |
| 5136083 | Process for the purification of 4-acetoxystyrene | Jack Chosnek, George E. Beck, Donna L. Keene, Siegbert Rittner | 1992-08-04 |