Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221767 | Compositions of the formula Mo.sub.12 P.sub.a V.sub.b X.sup.1 c X.sup.2 d X.sup.3 e Sb.sub.f Re.sub.g S.sub.h O.sub.n | Karl-Heinz Boehning, Gerd Duembgen, Ulrich Hammon, Franz Merger, Matthias Schwarzmann +2 more | 1993-06-22 |
| 5173468 | Compositions of the formula MO.sub.12 P.sub.a V.sub.b X.sup.1.sub.c X.sup.2.sub.d X.sup.3.sub.e Sb.sub.f Re.sub.g S.sub.h O.sub.n | Karl-Heinz Boehning, Gerd Duembgen, Ulrich Hammon, Franz Merger, Matthias Schwarzmann +2 more | 1992-12-22 |
| 5087744 | Preparation of methacrylic acid | Gerd Duembgen, Franz Merger, Michael Jaeger, Fritz Thiessen, Herbert Vogal | 1992-02-11 |
| 4925823 | Process and catalyst for the preparation of methacrylic acid | Gerd Duembgen, Friedbert Nees, Franz Merger, Gerd Fouquet | 1990-05-15 |
| 4656157 | Molded catalyst for reactions carried out under heterogeneous catalysis | Friedbert Hofmann, Matthias Schwarzmann | 1987-04-07 |
| 4638085 | Preparation of methyl methacrylate from methacrolein | Franz J. Broecker, Gerd Duembgen, Gerd Fouquet, Franz Merger, Friedbert Nees | 1987-01-20 |
| 4620035 | Production of acrylic acid by oxidation of acrolein | Heinz Engelbach | 1986-10-28 |
| 4595778 | Preparation of methacrylic acid and catalyst therefor | Gerd Duembgen, Gerd Fouquet, Franz Merger, Friedbert Nees | 1986-06-17 |
| 4520125 | Catalyst for the preparation of methyl methacrylate | Karl Baer, Peter Bassler, Gerd Duembgen, Gerd Fouquet, Franz Merger +1 more | 1985-05-28 |
| 4496770 | Process for the preparation of .alpha.-alkylacroleins | Gerd Duembgen, Gerd Fouquet, Ekhart Lucas, Franz Merger, Friedbert Nees | 1985-01-29 |
| 4489170 | Oxidation catalyst, especially for the preparation of methacrylic acid by gas phase oxidation of methacrolein | Matthias Schwarzmann | 1984-12-18 |
| 4487962 | Preparation of methacrylic acid by gas phase oxidation of methacrolein | Franz Merger, Matthias Schwarzmann | 1984-12-11 |
| 4409128 | Oxidation catalyst, especially for the preparation of methacrylic acid by gas phase oxidation of methacrolein | Franz Merger, Matthias Schwarzmann | 1983-10-11 |
| 4305843 | Preparation of coated catalysts | Heinz Engelbach, Peter Palm, Heinrich Spahn, Walter Herrmann | 1981-12-15 |
| 4298763 | Preparation of .alpha.,.beta.-olefinically unsaturated aldehydes of 3 or 4 carbon atoms | Heinz Engelbach, Gerd Duembgen, Carl-Heinz Willersinn, Walter Beitelschmidt | 1981-11-03 |
| 4297247 | Preparation of coated catalysts | Walter Herrmann, Heinz Engelbach, Peter Palm, Karl Sommer, Heinrich Spahn | 1981-10-27 |
| 4259211 | Catalyst for the oxidation of acrolein and methacrolein to acrylic acid and methacrylic acid, respectively | Walter Herrmann, Norbert Scholz, Heinz Engelbach, Gerd-Juergen Engert, Carl-Heinz Willersinn +2 more | 1981-03-31 |