Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7482424 | Process for the preparation of polymeric hydroxyalkyl terminated polysulphides | Michael Zeitler, Nils Kottner | 2009-01-27 |
| 7423183 | Oxidation of mercaptoethanol | Michael Zeitler, Nils Kottner | 2008-09-09 |
| 6583231 | Process to make aminated polyolefins | Klaus Ihrig, Ulrich Wecker | 2003-06-24 |
| 6320084 | Process for the preparation of glyceraldehyde and derivatives thereof | Ulrich Wecker | 2001-11-20 |
| 6166232 | Process for producing ester quats | Hartmut Ahrens, Axel Carstens | 2000-12-26 |
| 6075153 | Process for the preparation of Gamma-Butyrolactone and the use thereof | Kurt Uihlein | 2000-06-13 |
| 6008375 | Process for manufacturing 2-pyrrolidone or N-alkylpyrrolidones | Kurt Uihlein | 1999-12-28 |
| 5977350 | Process for the oxidation of di-, tri-, oligo- and polysaccharides into polyhydroxycarboxylic acids | Ludwig Eisenhuth | 1999-11-02 |
| 5648546 | Method for manufacturing tert-butylamine | Martin Nywlt | 1997-07-15 |
| 5543511 | Process for the preparation of level-off DP cellulose | J urgen Seifert | 1996-08-06 |
| 5536849 | Process for producing gamma-butyrolactone | Gunter Wiesgickl | 1996-07-16 |
| 5478950 | Process for producing pyrrolidone and N-alkyl pyrrolidones | Gunter Wiesgickl | 1995-12-26 |
| 5459249 | Process for continuous manufacture of alkylglycosides | Jurgen Seifert | 1995-10-17 |
| 5436346 | Process for the preparation of benzothiazolyl-2-sulphenamides | Ludwig Eisenhuth | 1995-07-25 |
| 5430187 | Method for manufacturing dibenzylamine | Burkhard Weuste | 1995-07-04 |
| 5367082 | Process for the preparation of 2-mercaptobenzothiazole | Norbert Gutlein, Klaus Wohlfahrt, Eberhard Aust | 1994-11-22 |
| 5124450 | Process for the preparation of 2-aminodithiothiazoles and 2-aminotrithiothiazoles | Ludwig Eisenhuth | 1992-06-23 |
| 5021603 | Thiuram polysulfide production | Ludwig Eisenhuth, Hans Zengel | 1991-06-04 |
| 5015752 | Thiuram polysulfide | — | 1991-05-14 |
| 4898978 | Process for the preparation of N,N'-disubstituted guanidines | Ludwig Eisenhuth, Hans Zengel | 1990-02-06 |
| 4853475 | Process for synthesizing alkylene bisdithiocarbamates or the ammonia adducts thereof as well as mixtures that can be synthesized thereby | Ludwig Eisenhuth | 1989-08-01 |
| 4831171 | Process for synthesizing an ammonia complex of zinc bisdithiocarbamate | Ludwig Eisenhuth | 1989-05-16 |
| 4783572 | Process for the preparation of ethylene-ethane mixtures | Klaus Wohlfahrt, Hans Zengel | 1988-11-08 |
| 4223145 | Process for the preparation of organic mono- and polyisocyanates | Peter Hentschel, Hans Zengel | 1980-09-16 |