Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859210 | Motor fuel or lubricant composition containing polybutyl or polyisobutyl derivatives | Rudolf Kummer, Helmut Mach, Hans Peter Rath | 1989-08-22 |
| 4832702 | Polybutyl-and polyisobutylamines, their preparation, and fuel compositions containing these | Rudolf Kummer, Hans Peter Rath | 1989-05-23 |