Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861508 | Moulded detergent compositions | Brigitte Giesen, Alfred Meffert, Claus Werner, Udo Hennen, Marlene Hormes | 1989-08-29 |
| 4830784 | Laundry detergents and cleaners with reduced requirement for conventional chemicals | Alfred Meffert, Brigitte Glesen, Andreas Syldatk, Johann F. Fues | 1989-05-16 |
| 4820448 | Surfactant mixtures and their use | Alfred Meffert, Ditmar Kischkel | 1989-04-11 |