Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4728435 | Decolorization of aqueous glyoxal solutions | Guenther Mueller, Rolf Ramsteiner, Fritz Graf | 1988-03-01 |
| 4698434 | Preparation of hydroxymethylimidazoles | Fritz Graf | 1987-10-06 |
| 4677230 | Preparation of 2-methyl-2-alkenals | Franz Merger, Franz J. Broecker, Rolf Fischer | 1987-06-30 |
| 4594461 | Preparation of trimethylolalkanes from alkanals and formaldehyde | Franz Merger, Peter Hettinger, Juergen Paetsch | 1986-06-10 |
| 4538009 | Preparation of substituted phenols | Norbert Goetz, Harald Laas, Peter Tavs, Karl Baer | 1985-08-27 |
| 4521632 | Purification of aqueous glyoxal solutions | Gerhard Wickenhaeuser, Bernd Heida, Fritz Graf | 1985-06-04 |
| 4450277 | Preparation of 1-substituted imidazoles | Fritz Graf | 1984-05-22 |
| 4429155 | Preparation of aromatic amines | Norbert Goetz, Peter Jacobs, Herbert Toussaint, Wolfgang Reiss | 1984-01-31 |
| 4393251 | Preparation of propanediols using a copper-and zinc containing hydrogenation catalyst | Franz J. Broecker, Franz Merger, Ernest Miesen, Juergen Paetsch, Guenter Zirker | 1983-07-12 |
| 4386018 | Hydrogenation catalysts for the preparation of propanediols | Franz Merger, Ernest Miesen, Franz J. Broecker, Wolfgang Schroeder, Karl Baer +1 more | 1983-05-31 |
| 4386219 | Hydrogenation catalysts for the preparation of propanediols and processes for the preparation of propanediols, using such catalysts | Franz Merger, Ernest Miesen, Franz J. Broecker, Wolfgang Schroeder, Karl Baer +1 more | 1983-05-31 |
| 4355180 | Preparation of primary aromatic amines from cyclic alcohols and/or ketones | Norbert Goetz, Werner Hoffmann, Manfred Baumann | 1982-10-19 |
| 4347388 | 3,6-Dimethyl-3-hydroxy-oct-1-ynes and -oct-1-enes, derivatives of these, and their use as scents, and in the preparation of 3,6-dimethyl-3-hydroxy-octane | Walter Gramlich, Werner Hoffmann, Bernd Meissner, Juergen Paetsch | 1982-08-31 |
| 4298733 | Preparation of cis-2,6-dimethylmorpholine | Norbert Goetz, Walter Himmele | 1981-11-03 |
| 4283534 | Reductive alkylation of nitrogen heterocycles | Norbert Goetz | 1981-08-11 |
| 4212972 | Preparation of cis-2,6-dimethylmorpholine | Norbert Goetz, Walter Himmele | 1980-07-15 |
| 4196147 | Manufacture of N-alkylanilines | Martin Decker, Herwig Hoffmann, Herbert Toussaint | 1980-04-01 |