Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5625097 | Process for preparing diphenylamines and catalysts usable for this purpose | Hans-Josef Buysch, Christine Mendoza-Frohn, J urgen Scharschmidt, Ulrich Notheis, Rudolf J. Klee | 1997-04-29 |
| 5606099 | Process for the preparation of succinic acid dialkyl esters | — | 1997-02-25 |
| 5386060 | Palladium catalyst and its use in the preparation of a mixture of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine | Otto Immel, Helmut Waldmann, Gerd-Michael Petruck | 1995-01-31 |
| 5371294 | Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine | Otto Immel, Hans-Josef Buysch | 1994-12-06 |
| 5344987 | Process for preparing diphenylamines | Otto Immel, Hans-Josef Buysch | 1994-09-06 |
| 5338885 | Process for the preparation of diphenylamines | Otto Immel, Hans-Josef Buysch | 1994-08-16 |
| 5322965 | Process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using a supported noble metal catalyst | Otto Immel, Helmut Waldmann, Gerd-Michael Petruck | 1994-06-21 |
| 5300706 | Process for the preparation of d,1-menthol | Otto Immel, Hans-Josef Buysch | 1994-04-05 |
| 5248840 | Process for the preparation of hydrooxydiphenyls | Otto Immel, Udo Birkenstock | 1993-09-28 |
| 5245082 | Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer | Otto Immel, Rudolf Braden, Hans-Helmut Schwarz, Helmut Waldmann | 1993-09-14 |
| 5196592 | Process for the preparation of diphenylamines | Otto Immel, Helmut Waldmann, Reinhard Langer, Hans-Josef Buysch | 1993-03-23 |
| 5162517 | Process for the preparation of epimer-free sugar alcohols from the group consisting of xylitol, sorbitol (D-glucitol), 4-O-.beta.-D-galactopyranosyl-D-glucitol and 4-O-.alpha.-D-glucopyranosyl-D-sorbitol | — | 1992-11-10 |
| 4684720 | Process for the preparation of a mixture of .alpha.-D-glucopyranosido-1,6-mannitol and .alpha.-D-glucopyranosido-1,6-sorbitol from .alpha.-D-glucopyranosido-1,6-fructose | Wolfgang Biedermann | 1987-08-04 |