Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252637 | Process for the reprocessing of used lubricating oils (II) | Helmut Knorre, Manfred Langer | 1981-02-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4252637 | Process for the reprocessing of used lubricating oils (II) | Helmut Knorre, Manfred Langer | 1981-02-24 |