Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5437849 | Method of processing vanadium-containing residues | — | 1995-08-01 |
| 5219543 | Process and apparatus for removing dust, sulfur compounds and nitrogen oxides from combustion exhaust gases | Werner Weisweiler, Erhard Herrmann, Harald Sauer, Bernd Thone | 1993-06-15 |
| 5198020 | Removal of zinc from phosphating process sludges | Rolf Kola, Dieter Jentsch | 1993-03-30 |
| 5116798 | Process for producing catalysts and impregnating solutions and catalysts produced by the process | — | 1992-05-26 |
| 4950139 | Process of catalytically reducing NO | Werner Weisweiler, Burkhard Retzlaff, Bernd HOCHSTEIN | 1990-08-21 |
| 4937054 | Method of regenerating ZrF.sub.4 pickling solutions | Erich Minzl, Horst Seidel | 1990-06-26 |
| 4851202 | Process for the simultaneous removal of nitrogen oxides and sulfur dioxide from an oxygen-containing exhaust gas | — | 1989-07-25 |
| 4842835 | Process of purifying flue gases | Karl-Heinz Dorr, Hugo Grimm, Heinz Neumann, Norbert Ohlms | 1989-06-27 |
| 4766104 | Process for producing a V.sub.2 O.sub.5 -and-alkali-metal-sulfate-containing catalyst for oxidizing SO.sub.2 to SO.sub.3 | — | 1988-08-23 |
| 4680281 | Process of producing a V.sub.2 O.sub.5 -and-alkali-metal-sulfate-containing catalyst for oxidizing SO.sub.2 to SO.sub.3 | — | 1987-07-14 |
| 4548797 | Process of removing pollutants from exhaust gases | Harald Sauer, Hans-Werner Schmidt | 1985-10-22 |
| 4431573 | Method of producing an alkali sulfate catalyst V.sub.2 O.sub.5 | Ulrich Sander, Manfred Bick | 1984-02-14 |
| 4399118 | Process of recovering anhydrous zirconium tetrafluoride | — | 1983-08-16 |
| 4330342 | Process for regenerating spent pickle liquid containing ZrF.sub.4 | Jurgen Haldorn | 1982-05-18 |