Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268509 | Process for the preparation of an iron catalyst and a process for the preparation of primary amines by the hydrogenation of nitriles using said iron catalyst | Otto Immel, Dietrich Liebsch, Stephan Herman Wendel, Peter Fischer | 1993-12-07 |
| 5245082 | Process for the production of di-(4-aminocyclohexyl)-methane containing 15 to 25% by weight of the trans-trans isomer | Otto Immel, Gerhard Darsow, Rudolf Braden, Helmut Waldmann | 1993-09-14 |
| 5233105 | Process for halogen-fluorine exchange in organic compounds and catalysts for this process | Rudolf Braden | 1993-08-03 |
| 5180861 | Process for the preparation of polychloro-fluoro-cyclo-pentenes | Rudolf Braden, Albrecht Marhold, Michael Negele | 1993-01-19 |
| 5174985 | Process for the oxidation of water-insoluble organic compounds | Friedhelm Sahlmen, Otto Immel, Hanno Henkel | 1992-12-29 |
| 5171901 | Process for the preparation of 1,1,1,3,3,3-hexafluoropropane and 2-chloro-1,1,1,3,3,3-hexafluoropropane | Karl-Rudolf Gassen, Dietmar Bielefeldt, Albrecht Marhold | 1992-12-15 |
| 5097071 | Supported copper catalyst, process for its preparation and process for the preparation of N-alkylated aromatic amines using this copper catalyst | Otto Immel, Rudolf Braden | 1992-03-17 |
| 5023226 | Ruthenium supported catalyst, its preparation and its use in the preparation of substituted or unsubstituted cyclohexylamine and substituted or unsubstituted dicyclohexylamine | Otto Immel, Reinhard Thiel | 1991-06-11 |
| 4952549 | Ruthenium catalyst, process for its preparation and process for the preparation of a mixture of cyclohexylamine and dicyclohexylamine using the ruthenium catalyst | Otto Immel | 1990-08-28 |
| 4943549 | Supported ruthenium catalyst, its preparation and its use in the preparation of optionally substituted cyclohexylamine and optionally substituted dicyclohexylamine | Otto Immel, Reinhard Thiel | 1990-07-24 |
| 4902661 | Rhodium catalysts, process for their preparation and process for the preparation of substituted or unsubstituted diphenylamine by using the rhodium catalysts | Otto Immel | 1990-02-20 |
| 4804753 | Process for the preparation of Schiff's bases | — | 1989-02-14 |
| 4729977 | Supported catalyst, process for its preparation and its use for the preparation of hydroxydiphenyl | Otto Immel, Oskar Weissel | 1988-03-08 |
| 4588833 | Process for the preparation of substituted succinic acid amides | Jurgen Kadelka | 1986-05-13 |
| 4514578 | Process for the preparation of trimethylolpropane | Otto Immel, Hein Quast, Eberhard Bandtel | 1985-04-30 |
| 4371691 | Preparation of polycarbonate from specific crude bisphenols | Gerhard Friedhofen, Volker Serini, Rainer Neumann, Dieter Freitag | 1983-02-01 |
| 4348542 | Process for the production of mixtures of alkylated aromatic hydroxy compounds | Volker Serini, Rainer Neumann, Gerhard Friedhofen, Dieter Freitag, Jürgen Heuser | 1982-09-07 |
| 4319053 | Process for the preparation of 4,4'-dihydroxy-3,3',5,5'-tetraalkyl-diphenylalkanes | Jürgen Heuser, Gunther Jeromin, Gerhard Friedhofen | 1982-03-09 |
| 4307253 | Process for the preparation of alkyl aryl ethers | Rainer Neumann, Dieter Nachtsheim | 1981-12-22 |
| 4247485 | Process for the preparation of 2,2-dimethylolalkanals | Otto Immel, Hein Quast | 1981-01-27 |
| 4233247 | Process for the preparation of 2,2-dimethylolalkanals | Otto Immel | 1980-11-11 |
| 4191711 | Process for the preparation of certain nuclear chlorinated benzotrichlorides | Manfred Lenthe | 1980-03-04 |
| 4181810 | Process for the preparation of propane-1,3-diols, disubstituted in the 2-position | Otto Immel, Oskar Weissel | 1980-01-01 |