Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853481 | Preparation of alkyl-substituted aromatic ketones | Jochem Henkelmann, Manfred Eggersdorfer, Walter Grosch, Alfred Schuhmacher | 1989-08-01 |
| 4837201 | 4-Methyl-4-phenyl-1-pentanals, their preparation and their use as scents | Walter Gramlich, Norbert Goetz, Gerhard Schindler | 1989-06-06 |
| 4820389 | Novel benzaldehyde dialkyl acetals and preparation and use thereof | Dieter Degner, Walter Gramlich, Franz Lanzendoerfer | 1989-04-11 |