Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5631385 | Method for the preparation of N-substituted 4-ketoproline derivatives | Karlheinz Drauz, Klaus Stingl | 1997-05-20 |
| 5616727 | Process for purifying 1-[N.sup.2 -((S)-ethoxycarbonyl)-3-phenylpropyl)-N.sup.6 -trifluoroacetyl]-l-lysyl-l-proline (lisinopril (TFA) ethyl ester | Karlheinz Drauz | 1997-04-01 |
| 5608076 | Method of preparing amionoakylhydantoins and aminoalkyl-alpha-amino acids | Karlheinz Drauz, Andreas Bommarius | 1997-03-04 |