Issued Patents All Time
Showing 76–90 of 90 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6228227 | Separation of (meth)acrylic acid by rectification | Holger Herbst, Gerhard Nestler, Jerry Darlington | 2001-05-08 |
| 6166248 | Process for the separation of acrylic acid | Bernd Heida, Fritz Thiessen, Albrecht Dams | 2000-12-26 |
| 5961790 | Separation of (meth) acrylic acid by rectification | Holger Herbst, Gerhard Nestler, Jerry Darlington | 1999-10-05 |
| 5855743 | Process of isolation of (Meth) acrylic acid | Holger Herbst | 1999-01-05 |
| 5821390 | Catalytic gas-phase oxidation of propene to acrolein | Wilhelm Ruppel, Ulrike Wegerle, Andreas Tenten | 1998-10-13 |
| 5739391 | Catalytic gas-phase oxidation of acrolein to acrylic acid | Wilhelm Ruppel, Ulrike Wegerle, Andreas Tenten | 1998-04-14 |
| 5728272 | Separation by rectification of unsaturated carboxylic acids from solvents | Volker Schliephake, Wolfgang Pies, Ulrich Rauh | 1998-03-17 |
| 5637222 | Process for the fractional separation of (meth)acrylic acid from a mixture containing (meth)acrylic acid | Holger Herbst, Gerhard Nestler | 1997-06-10 |
| 5637546 | Preparation of catalytically active poly-metal oxide materials which contain the elements V and Mo in oxide form as basic components | Andreas Tenten, Peter Weidlich | 1997-06-10 |
| 5512525 | Regeneration of spent multimetal oxide oxidation catalysts from the catalytic gas-phase oxidation of lower organic compounds | Andreas Tenten, Peter Weidlich, Walter Doerflinger | 1996-04-30 |
| 5264625 | Catalytic gas-phase oxidation of acrolein to acrylic acid | Klaus Herzog, Hans-Peter Neumann | 1993-11-23 |
| 5231226 | Catalytic gas-phase oxidation of methacrolein to methacrylic acid | Klaus Herzog, Hans-Peter Neumann | 1993-07-27 |
| 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, Richard Krabetz, 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, Richard Krabetz, Franz Merger, Matthias Schwarzmann +2 more | 1992-12-22 |
| 4594332 | Preparation of hard, fracture-resistant catalysts from zeolite powder | Wolfgang Hoelderich, Lothar Riekert, Michael Kotter | 1986-06-10 |