Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4329329 | Process for obtaining carbon black from aqueous suspensions | Wilfried Dolkemeyer, Kurt Erdt, Rene Hentges | 1982-05-11 |
| 4319982 | Method of processing oil-shale or tar sand | Karl-Heinz Keim | 1982-03-16 |