Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835202 | (Hydroxyphenyl) phosphine stabilized compositions | Stephen D. Pastor, Edward T. Hessell | 1989-05-30 |
| 4808644 | Substituted (4-hydroxyphenylthioalkyl) derivatives | Ramanathan Ravichandran, Stephen D. Pastor | 1989-02-28 |
| 4808645 | 6-(1-hydro-2,2,6,6-tetraalkyl-piperidine-4-oxy)dibenzodioxaphosphepin and dioxaphosphocin process stabilizers | Ramanathan Ravichandran | 1989-02-28 |