Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864026 | Method of manufacturing N-alkyl-N'-methyl-alkyleneureas, particularly N,N'- d | Peter Bickert | 1989-09-05 |
| 4855488 | Process for the preparation of dicyclopentenol esters | Fritz Gude | 1989-08-08 |
| 4845303 | Procedure for the production of beta-isophorone from alpha-isophorone | — | 1989-07-04 |