Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863982 | Isocyanuric acid derivatives | Werner Stegmann, Eduard Troxler, Peter Hofmann, Hans-Rudolf Meier | 1989-09-05 |
| 4820756 | Thioether substituted phenols and their use as stabilizers | Rita Pitteloud | 1989-04-11 |
| 4810740 | Stabilized organic material | Rita Pitteloud | 1989-03-07 |
| 4798822 | Selected 3,9-di(2,2,6,6-tetramethyl-4-piperidyl)-2,4,8,10-tetraoxa-3,9-diphosphas piro [5,5]undecanes | Michael Rasberger, Peter Hofmann, Hans-Rudolf Meier | 1989-01-17 |