Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6300517 | Phosphine ligands with amino acid groups, method for their production and use thereof as catalyst components | Michael Tepper | 2001-10-09 |
| 6187953 | Guanidinium phosphanes, their production and their use | Franz Peter Schmidtchen, Antonella Hessler, Michael Tepper, Harald Dibowski, Michael Riedel +1 more | 2001-02-13 |
| 6011172 | Process for alkylating elemental phosphorus | Norbert Weferling, Gunter Kolbe | 2000-01-04 |
| 5925785 | Secondary and tertiary phosphines and processes for their preparation | Oliver Herd, Norbert Weferling | 1999-07-20 |
| 5268479 | Process for the preparation of tertiary phosphines | Klaus-Peter Langhans, Norbert Weferling | 1993-12-07 |
| 5003108 | Process for the preparation of phosphanes | Klaus-Peter Langhans, Jurgen Svara, Norbert Weferling | 1991-03-26 |