Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5677314 | Bis(methylidene)phenylene derivatives | Inge Stein, Ulrich Heywang, Michael Kompter | 1997-10-14 |
| 5639883 | Process for preparing substituted 4-methylidenecinnamic acid derivatives | Eike Poetsch, Volker Meyer, Ulrich Heywang, Inge Stein, Michael Kompter | 1997-06-17 |
| 5628988 | Ketotricyclo[5.2.1.0]decane derivatives | Ingeborg Stein, Ulrich Heywang, J urgen Eckstein | 1997-05-13 |
| 5600007 | Use of .alpha.-hydroxyketoalkyl derivatives as light protection filters | Roland Martin, Ingeborg Stein, Ulrich Heywang, Thekla Kurz | 1997-02-04 |