Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4539408 | Process for the preparation of sulphoalkyl quaternary salts | Helmut Kampfer, Max Glass | 1985-09-03 |
| 4504668 | Process for the preparation of N-sulfoalkyl quaternary salts of nitrogen heterocyclics | Helmut Kampfer, Max Glass | 1985-03-12 |
| 4483799 | Hydroxy alkane sulfonic acid sulfoalkyl esters | Helmut Kampfer, Detlef Wendisch | 1984-11-20 |