Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885117 | Process for the preparation of (Z)-17.alpha.-halovinyl steroids | Helmut Hofmeister, Rudolf Wiechert | 1989-12-05 |
| 4868166 | 2,2:6,6-diethylen-3-oxo-17alpha-pregn-4-ene-21,17alpha-carbolactones, process for their production & pharmaceutical preparations containing them | Dieter Bittler, Klaus Nickisch, Rudolf Wiechert, Martin Haberey | 1989-09-19 |
| 4859659 | Dermatics utilizing 17.beta.methyl-18 nor steroids and methods for their use | Dieter Bittler, Klaus Nickisch, Petra Rach | 1989-08-22 |