Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874797 | Oligourea polyols, polyether polyols produced from them and the use of these polyols in the isocyanate polyaddition process | Peter Haas, Claus-Dieter Sommerfeld | 1989-10-17 |