Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4309178 | Process for isolating sulphur dyestuffs from aqueous crude melts containing sodium polysulphide | Artur Meyer, Wolf Weidemuller | 1982-01-05 |
| 4309401 | Process for the manufacture of sulphur which can be recycled | — | 1982-01-05 |