Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5710330 | Process for preparing alkanephosphonic anhydrides | Carl Christoph Mollenkopf, Gunter Roscher | 1998-01-20 |
| 5490936 | Process for catalyst recovery | Wolf-Dietmar Kaufmann, Bernd Laugwitz, Gunther Duchatsch, Ulrich Meyer-Blumenroth | 1996-02-13 |
| 5396012 | Process for the preparation of monoisopropylnaphthalene | Marita Neuber, Udo Dettmeier | 1995-03-07 |
| 5367104 | Process for the purification of organic compounds contaminated by dissolved metal compounds | Udo Dettmeier, Gustav Gimpel, Walter Reimann | 1994-11-22 |
| 5292626 | Developer composition for irradiated, radiation-sensitive positive-working, negative-working and reversible reprographic layers | Gerhard Buhr, Andreas Elsaesser, Hans W. Frass | 1994-03-08 |
| 5264094 | Process for the preparation of fluorobenzenes | Frank P. Sistig, Heinz Litterer | 1993-11-23 |
| 5238597 | Sucrosetricarboxylic acid and compositions containing the same | Wolfram Fritsche-Lang, Merten Schlingmann | 1993-08-24 |
| 5230804 | Process for separating catalysts from suspensions by filtration | Eduard Zeisberger, Manfred Kauffelt, Willi Herzog, Udo Dettmeier, Georg Weichselbaumer | 1993-07-27 |
| 5227529 | Process for the acylation of naphthyl ethers with the aid of zeolite catalysts | Marita Neuber | 1993-07-13 |
| 5210259 | Process for the oxidation of dialkyl esters of 2-hydroxy-ethylphosphonic acid | Gunter Roscher | 1993-05-11 |
| 5082504 | Process for the preparation of a mixture of sucrose oxidation products and the use thereof | Karl-Heinz Schonwalder, Wolfram Fritsche-Lang, Merten Schlingmann, Adolf Linkies, Werner Gohla +1 more | 1992-01-21 |
| 5043493 | Process for the preparation of 2-chloro- or 2-bromo-naphthalene | Marita Neuber | 1991-08-27 |
| 5019624 | Polyvinyl acetals and their use | Matthias Gutweiler, Robert K. Driscoll | 1991-05-28 |
| 4977283 | Process for the oxidation of 5-hydroxymethylfurfural | Matthias Wiesner, Merten Schlingmann, Knut M. Rapp | 1990-12-11 |
| 4976893 | Process for preparing carboxylic acids | — | 1990-12-11 |
| 4968833 | Process for the preparation of a glyoxylic acid ester | Robert K. Driscoll, Wolfgang Ebertz, Friedrich Wunder | 1990-11-06 |
| 4937395 | Process for the preparation of fluorobenzenes | Heinz Litterer, Hans Joachim Metz, Theodor Papenfuhs, Frank P. Sistig | 1990-06-26 |
| 4935561 | Process for isomerizing monochlorotoluenes or dichlorotoluenes | Klaus Eichler, Hans-Jurgen Arpe, Herbert Baltes | 1990-06-19 |
| 4814491 | Hemiacetals of glyoxylic esters and a process for the isolation of glyoxylic esters | Robert K. Driscoll, Joachim Schutz | 1989-03-21 |
| 4783541 | Process for isomerizing alkylthiophenes | Klaus Eichler | 1988-11-08 |
| 4720583 | Process for the isomerization of o-, m- and/or p-toluidine | Klaus Eichler, Hans-Jurgen Arpe, Herbert Baltes | 1988-01-19 |
| 4692547 | Process for the preparation of glyoxylic hemiacetal esters | Robert K. Driscoll, Wolfgang Ebertz | 1987-09-08 |
| 4605809 | Aluminosilicates and silica gels having a low content of transition elements, a process for their use in the conversion of methanol to olefins | Heinz Litterer, Friedrich Wunder, Herbert Baltes | 1986-08-12 |
| 4604470 | Process for the isomerization of halogenated thiophenes | Klaus Eichler | 1986-08-05 |
| 4590217 | Process for the manufacture of acetic acid, acetaldehyde and ethanol | Hans-Joachim Schmidt, Friedrich Wunder | 1986-05-20 |