Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797436 | Oligomeric diazaoxaspirodecanes, preparation thereof and use thereof as light stabilizers for polymers | Helmut Korbanka | 1989-01-10 |
| 4771091 | Substituted diazaoxaspirodecanes, preparation thereof and use thereof as stabilizers for polymers | — | 1988-09-13 |
| 4755602 | Process for preparing 1-oxa-3,8-diaza-4-oxo-spiro-[4,5]-decanes | — | 1988-07-05 |
| 4745192 | 1-oxa-3-oxo-4,8-diaza-spiro(4,5)decane compounds | — | 1988-05-17 |
| 4689416 | Process for the preparation of 1-oxa-3,8-diaza-4-oxo-spiro(4.5)decane compounds | Hartmut Wiezer | 1987-08-25 |