Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879368 | Oligobenzylated hydroxycarboxylic acid derivative | Artur Botta | 1989-11-07 |
| 4874832 | Microcapsules having polyurethane walls | Adolf Richartz | 1989-10-17 |
| 4847152 | Microcapsules with improved polyurea walls | Ulrich Nehen, Hans-Joachim Scholl | 1989-07-11 |
| 4831141 | Chromogenic 3,1-benzoxazines | Horst Berneth | 1989-05-16 |