Issued Patents All Time
Showing 26–50 of 77 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268345 | Reactivation of montmorillonite catalysts | — | 1993-12-07 |
| 5247049 | Thermoplastic polyurethane elastomers with a low degree of organic carbon migration | Peter Groll, Wolfgang Straehle | 1993-09-21 |
| 5218141 | Preparation of polyoxybutylele polyoxyalkylene glycol dicarboxylates | — | 1993-06-08 |
| 5112943 | Preparation of high purity polymers of tetrahydrofuran | — | 1992-05-12 |
| 5108717 | Apparatus for the catalytic conversion of waste gases | Klaus Deller, Hans Moesinger, Josef Riedel, Wenzel Kuehn, Rudolf Spielmannleitner | 1992-04-28 |
| 5099074 | Process for the preparation of polyether glycols | Gerhard Jeschek, Rolf Fischer, Hans-Juergen Weyer | 1992-03-24 |
| 5097077 | Purification of heteropolyacid-containing polyalkylene ether glycols | Gerhard Jeschek, Rolf Fischer, Hans-Juergen Weyer | 1992-03-17 |
| 4983366 | Method for the catalytic conversion of waste gases containing hydrocarbon, halogenated hydrocarbon and carbon monoxide | Klaus Deller, Hans Moesinger, Josef Riedel, Wenzel Kuehn, Rudolf Spielmannleitner | 1991-01-08 |
| 4973761 | Aminomono- or -di-[(poly-n-butoxy)-n-butylamino]-(poly-n-butoxy)-n-butylamines | Willibald Schoenleben | 1990-11-27 |
| 4973769 | Preparation of 1,2,4-butanetriol | Walter Mesch, Klaus Broellos | 1990-11-27 |
| 4952673 | Purification of copolymers of tetrahydrofuran and alkene oxides | — | 1990-08-28 |
| 4933503 | Narrowing the molecular weight distribution of polytetrahydrofuran and of copolymers of tetrahydrofuran and alkylene oxides | — | 1990-06-12 |
| 4922023 | Preparation of aliphatic N,N-dialkyl-substituted amino alcohols | Roman Fischer, Hans Jochen Mercker | 1990-05-01 |
| 4911793 | Distillative isolation of N-ethylpiperazine in the presence of water | Dieter Franz | 1990-03-27 |
| 4910304 | Preparation of N-substituted cyclic amines | Roman Fischer, Dieter Voges | 1990-03-20 |
| 4864066 | Preparation of alkanediols from alkynols | Herbert Toussaint, Juergen Schossig | 1989-09-05 |
| 4851580 | Preparation of trialkylamines | Roman Fischer, Gerhard Jeschek, Willibald Schoenleben | 1989-07-25 |
| 4851578 | Preparation of trialkylamines | Roman Fischer | 1989-07-25 |
| 4827035 | Preparation of amines | Hartmut Axel | 1989-05-02 |
| 4803299 | Preparation of polytetramethylene ether glycol diesters having a low color number | — | 1989-02-07 |
| 4798851 | Process for the preparation of elastic, noncellular or cellular polyurethane- or polyurethane-polyurea molded articles | Frank Werner, Joachim Streu | 1989-01-17 |
| 4798554 | Balloon holder | David C. Nelson, Michael J. Fresh | 1989-01-17 |
| 4792631 | Preparation of di-tert.-butylethylenediamine | Walter Mesch | 1988-12-20 |
| 4786727 | Preparation of hexamethyleneimine | Wolfgang Schroeder, Wolfgang Franzischka | 1988-11-22 |
| 4762951 | Narrowing the molecular weight distribution of poly-tetrahydrofuran and of copolymers of tetrahydrofuran and alkylene oxides | — | 1988-08-09 |