Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5275791 | Process for the leaching of gold and silver with cyanidic leaching solution and controlled addition of hydrogen peroxide | Andrew Griffiths, Juergen Loroesch, Joachim Fischer | 1994-01-04 |
| 5250272 | Process for leaching precious metals with hydrogen-peroxide and a cyanide leaching solution | Juergen Loroesch, Steven Gos, Mathias Stoll, Annette Ziegler | 1993-10-05 |
| 5178775 | Cost effective process for detoxification of cyanide-containing effluents | M. Quamrul Ahsan, Stephen Gos, Roy Norcross, Friedrich W. Merz | 1993-01-12 |
| 4915849 | Process for the treatment of effluents containing cyanide and other oxidizable substances | Andrew Griffiths, M. Quamrul Ahsan, Roy Norcross, Friedrich W. Merz | 1990-04-10 |
| 4731232 | Process for the purification of industrial gases or waste gases | Joachim Fischer | 1988-03-15 |
| 4416786 | Process for the treatment of continuous waste water streams having changing contents of different oxidizable materials with hydrogen peroxide | Joachim Fischer, Klaus Stutzel | 1983-11-22 |
| 4366049 | Process for recycling of used lubricating oils | Manfred Langer, Friedrich Fauser, Willi Fischer | 1982-12-28 |
| 4280914 | Process for automatically controlling the detoxification of waste waters containing nitrite ions | Joachim Fischer | 1981-07-28 |
| 4255252 | Procedure for the reprocessing of used lubricating oils | Manfred Langer, Gerhard Pohl | 1981-03-10 |
| 4252637 | Process for the reprocessing of used lubricating oils (II) | Manfred Langer, Axel Waniorek | 1981-02-24 |