Issued Patents All Time
Showing 126–150 of 153 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5885394 | Production of sheet-like polyurethane moldings | Dietrich Scherzer, Rolf Illguth, Ludwig Jung | 1999-03-23 |
| 5872278 | Preparation of isocyanates having a light color | Rupert Kraus, Martin Reif, Helmut Tesch | 1999-02-16 |
| 5808138 | Stable polyisocyanate copositions obtainable by phosgene-free methods and their preparation | Gerhard Laqua, Stefan Wolff | 1998-09-15 |
| 5786402 | Production of polyurethane foams in the presence of aminoalkyl- or aminophenylimidazoles as catalyst, and the use of these catalysts for the preparation of polyisocyanate polyaddition products | Ruth Zschiesche, Heinz-Dieter Lutter, Claudia Spang, Werner Hinz | 1998-07-28 |
| 5744569 | One-component and two-component polyurethane coating compositions | Hans Renz, Gunter Mohrhardt | 1998-04-28 |
| 5654479 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Helmut Tesch, Roland Minges, Johann Swoboda +3 more | 1997-08-05 |
| 5637664 | Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups | Roland Minges, Christian Schade, Konrad Stiefenhoefer | 1997-06-10 |
| 5621138 | 4-substituted bis (2,6-diisopropylphenyl)- carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Helmut Tesch, Roland Minges, Johann Swoboda +3 more | 1997-04-15 |
| 5597942 | Carbodiimides and/or oligomeric polycarbodiimides based on 1 3-bis (1-methyl-1-isocyanatoethyl) benzene their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Helmut Tesch, Roland Minges +1 more | 1997-01-28 |
| 5597885 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures | Heinz-Dieter Lutter, Claudia Spang, Roland Minges, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-28 |
| 5596063 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of this type | Heinz-Dieter Lutter, Claudia Spang, Roland Minges, Dietrich Scherzer, Michael Lugmayr +1 more | 1997-01-21 |
| 5565527 | Polymeric, catalytically active compounds, their preparation, and their use as catalysts in the preparation of polyisocyanates containing uretdione groups | Roland Minges, Christian Schade, Konrad Stiefenhoefer | 1996-10-15 |
| 5534185 | Process for the preparation of fluorochlorohydrocarbon-free low density polyurethane soft foams and soft elastic polyurethane molding foams and polyisocyanate mixtures modified with urethane groups and diphenylmethane-diisocyanate base | Werner Hinz, Ruth Zschiesche, Heinz-Dieter Lutter | 1996-07-09 |
| 5532414 | 4-substituted bis(2,6-diisopropylphenyl)-carbodiimides, their preparation, their use, and 4-substituted 2,6-diisopropylphenyl isocyanates which can be used for their preparation | Friedhelm Lehrich, Siegmund Pohl, Helmut Tesch, Roland Minges, Johann Swoboda +3 more | 1996-07-02 |
| 5504241 | Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Helmut Tesch, Roland Minges +1 more | 1996-04-02 |
| 5498747 | Carbodiimides and/or oligomeric polycarbodiimides based on 1,3-bis (1-methyl-1-isocyanatoethyl)benzene, their preparation, and their use as hydrolysis stabilizers | Siegmund Pohl, Friedhelm Lehrich, Manfred Genz, Helmut Tesch, Roland Minges +1 more | 1996-03-12 |
| 5494941 | Preparation of chlorofluorocarbon-free flexible polyurethane foams using diphenylmethane diisocyanate-based polyisocyanate mixtures containing urethane groups, and modified polyisocyanate mixtures of the type | Heinz-Dieter Lutter, Claudia Spang, Roland Minges, Dietrich Scherzer, Michael Lugmayr +1 more | 1996-02-27 |
| 5489663 | Preparation of polyisocyanates containing isocyanurate groups and use thereof | Peter Brandt, Gerhard Laqua, Franz Merger, Andreas Otterbach, Konrad Stiefenhöfer +3 more | 1996-02-06 |
| 5484916 | Process for the preparation of isocyanates containing uretdione groups by using imidazole group containing polymeric catalysts | Roland Minges, Christian Schade | 1996-01-16 |
| 5449775 | Imidazole group containing polymeric catalysts their preparation, and their use in the preparation of isocyanates containing uretdione groups | Roland Minges, Christian Schade, Konrad Stiefenhoefer | 1995-09-12 |
| 5436336 | Preparation of isocyanurate- and/or uretidone-containing polysiocyanates having a reduced color index and improved shelf life, and products prepared by this method | Stefan Wolff, Konrad Stiefenhoefer | 1995-07-25 |
| 5374667 | Process for the preparation of fluorochlorohydrocarbon-free, low-density polyurethan soft foams and soft elastic polyurethan molding foams and polyisocyanate mixtures modified with urethan groups on diphenylmethane-diisocyanate base | Werner Hinz, Ruth Zschiesche, Heinz-Dieter Lutter | 1994-12-20 |
| 5329003 | Process for the preparation of uretdione group containing polyisocyanates | — | 1994-07-12 |
| 5208368 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number | Dietrich Scherzer, Roland Minges, Wolfgang Heider, Willy van Pee, Peter Keller | 1993-05-04 |
| 5207942 | Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number | Dietrich Scherzer, Roland Minges, Werner Langer, Wolfgang Heider, Peter Keller +2 more | 1993-05-04 |