Issued Patents All Time
Showing 51–75 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5149850 | Process for the production of high-purity tetrachloro-1,4-benzoquinone | Otto Arndt | 1992-09-22 |
| 5101069 | Process for the preparation of hydroxyethylsulfonylnitro- and hydroxyethylsulfonylamino-benzoic acids | — | 1992-03-31 |
| 5087725 | Process for the preparation of alkyl nitrobenzoates | Reiner Hess, Andreas Fuss | 1992-02-11 |
| 4992589 | Substituted phenyl hydroxyethyl sulfones, and process for their preparation | Hermann Fuchs, Werner Brodt, Folker Kohlhaas | 1991-02-12 |
| 4968845 | Process for the preparation of halogen-containing aromatic compounds | Joachim Hackenbruch, Klaus Warning, Gunter Siegemund | 1990-11-06 |
| 4960929 | Hydroxyethylsulfonylnitro- and hydroxyethylsulfonylamino-benzoic acids and processes for their preparation | — | 1990-10-02 |
| 4960940 | Bis(hydroxyethylsulfonylmethyl)anilines and a process for their preparation | Josef Geisenberger | 1990-10-02 |
| 4948919 | Arylaminonitrophenyl hydroxyethyl sulfones | Werner Brodt | 1990-08-14 |
| 4937395 | Process for the preparation of fluorobenzenes | Heinz Litterer, Hans Joachim Metz, Frank P. Sistig, Ernst I. Leupold | 1990-06-26 |
| 4922014 | Process for the preparation of oxethylmercaptobenzaldehydes and their oxidation products | — | 1990-05-01 |
| 4908478 | Single-vessel process for preparing 2-acetaminonaphthalene-6-sulfonic acid of high purity | Otto Arndt | 1990-03-13 |
| 4851575 | Process for the preparation of 2-nitro-4-sulfamyldiphenylamine dyestuffs | Werner Brodt | 1989-07-25 |
| 4824962 | Process for the preparation of naphthostyril | Otto Arndt | 1989-04-25 |
| 4808752 | Process for the preparation of 2-aminophenyl thioethers | — | 1989-02-28 |
| 4778911 | Process for preparation of 3-(acyl)amino-4-alkoxy-phenyl-.beta.-hydroxyethyl-sulfone (sulfonates) | Peter Hess, Folker Kohlhaas | 1988-10-18 |
| 4760183 | Process for the preparation of aromatic dialkylamines | Walter Kuhn | 1988-07-26 |
| 4754071 | Process for preparing aryl hydroxyethyl sulfones | Wolfgang Koller, Walter Kuhn | 1988-06-28 |
| 4727154 | Process for the preparation of 2-substituted benzothiazoles | — | 1988-02-23 |
| 4719304 | Process for preparing 2-aminobenzothiazoles | Heinz Rentel | 1988-01-12 |
| 4686301 | Process for the preparation of 2,4-dinitrophenol alkoxyalkyl ethers | Friedrich Schophoff | 1987-08-11 |
| 4658034 | Process for the preparation of 2,6-dichlorobenzoxazole | Otto Arndt | 1987-04-14 |
| 4613698 | Process for the preparation of 6-chloro-2,4-dinitroaniline | Otto Arndt | 1986-09-23 |
| 4613704 | Process for the preparation of 5-hydroxyethylsulfonyl-2-aminophenol (ethers) | — | 1986-09-23 |
| 4612396 | Process for the preparation of pure 2-ethylamino-4-nitro-1-alkoxybenzenes | Wolfgang Koller | 1986-09-16 |
| 4605767 | Process for the preparation of 2,6-dichloro-4-nitroaniline | Otto Arndt | 1986-08-12 |