Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5536849 | Process for producing gamma-butyrolactone | Manfred Bergfeld | 1996-07-16 |
| 5478950 | Process for producing pyrrolidone and N-alkyl pyrrolidones | Manfred Bergfeld | 1995-12-26 |