Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847425 | Prepartion of 4-isopropylcyclohexylmethanol and its alkyl ethers | Walter Gramlich, Wolfgang Lengsfeld, Ludwig Schuster | 1989-07-11 |
| 4820389 | Novel benzaldehyde dialkyl acetals and preparation and use thereof | Walter Gramlich, Franz Lanzendoerfer, Hardo Siegel | 1989-04-11 |
| 4814510 | Novel benzaldehyde derivatives, their preparation, and their use | Walter Gramlich, Heinz Hannebaum | 1989-03-21 |