Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827860 | Method for eliminating nickel ions and lead ions from ferrous salt solutions | — | 2004-12-07 |
| 5407650 | Process for purifying a technical iron chloride solution by selective precipitation | Achim Hartmann, Ulrich Rothe | 1995-04-18 |
| 5334362 | Process for the production of disposable products from metal chlorides in a titanium dioxide chloride process | Hans Thumm | 1994-08-02 |
| 5282977 | Separation of heavy metals from waste water of the titanium dioxide industry | — | 1994-02-01 |
| 4394270 | Apparatus for the chemical conditioning of sludges | Achim Hartmann | 1983-07-19 |
| 4207201 | Process for the manufacture of an aqueous iron (III)-chloride-sulfate solution | Achim Hartmann, Achim Kulling, Edgar Klein | 1980-06-10 |