Wolfgang Fennemann
14Patents
6h-index
18Co-inventors
59Inventor score
Filing activity: Feb 26, 1981 → May 20, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4548797A | Process of removing pollutants from exhaust gases | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4330342A | Process for regenerating spent pickle liquid containing ZrF.sub.4 | Chemistry; Metallurgy | 8 | Expired |
| US4851202A | Process for the simultaneous removal of nitrogen oxides and sulfur dioxide from an oxygen-containing exhaust gas | Performing Operations; Transporting | 7 | Expired |
| US4766104A | 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 | Performing Operations; Transporting | 6 | Expired |
| US4431573A | Method of producing an alkali sulfate catalyst V.sub.2 O.sub.5 | Performing Operations; Transporting | 6 | Expired |
| US4950139A | Process of catalytically reducing NO | Performing Operations; Transporting | 6 | Expired |
| US4842835A | Process of purifying flue gases | Chemistry; Metallurgy | 5 | Expired |
| US5116798A | Process for producing catalysts and impregnating solutions and catalysts produced by the process | Chemistry; Metallurgy | 4 | Expired |
| US4680281A | 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 | Performing Operations; Transporting | 4 | Expired |
| US4399118A | Process of recovering anhydrous zirconium tetrafluoride | Chemistry; Metallurgy | 2 | Expired |
| US5219543A | Process and apparatus for removing dust, sulfur compounds and nitrogen oxides from combustion exhaust gases | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5198020A | Removal of zinc from phosphating process sludges | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4937054A | Method of regenerating ZrF.sub.4 pickling solutions | Chemistry; Metallurgy | 1 | Expired |
| US5437849A | Method of processing vanadium-containing residues | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.