Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5744010 | Process for the preparation of the non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and arrangement for carrying out this process | Gunter Roscher, Axel Engelmann, Wolf-Dietmar Kaufmann, Bernd Laugwitz, Hans-Dietmar Schnabel | 1998-04-28 |
| 5264094 | Process for the preparation of fluorobenzenes | Frank P. Sistig, Ernst I. Leupold | 1993-11-23 |
| 5100520 | Process for the preparation of thiophene derivatives | Steffen Dapperheld, Michael Feldhues, Frank P. Sistig, Peter Wegener | 1992-03-31 |
| 4937395 | Process for the preparation of fluorobenzenes | Hans Joachim Metz, Theodor Papenfuhs, Frank P. Sistig, Ernst I. Leupold | 1990-06-26 |
| 4931568 | Process for the preparation of thiophene ethers | Peter Wegener, Michael Feldhues | 1990-06-05 |
| 4650915 | Process for preparing p-chlorotoluene and/or m-chlorotoluene | Hans-Jurgen Arpe, Norbert Mayer | 1987-03-17 |
| 4605809 | Aluminosilicates and silica gels having a low content of transition elements, a process for their use in the conversion of methanol to olefins | Friedrich Wunder, Ernst I. Leupold, Herbert Baltes | 1986-08-12 |
| 4554380 | Process for the manufacture of o-toluidine and/or m-toluidine and/or p-toluidine | Hans-Jurgen Arpe | 1985-11-19 |
| 4522800 | Process for the production of a crystalline aluminosilicate zeolite | Herbert Baltes, Ernst I. Leupold, Friedrich Wunder | 1985-06-11 |
| 4487971 | Process for the isolation of crystalline 1,3-cylohexanedione | Helmut Meidert | 1984-12-11 |
| 4481376 | Process for the synthesis of lower olefins from methanol and/or dimethyl ether | Friedrich Wunder, Ernst I. Leupold | 1984-11-06 |
| 4480128 | Process for the manufacture of o-toluidine and/or m-toluidine and/or p-toluidine | Hans-J/u/ rgen Arpe | 1984-10-30 |