Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8048489 | Compositions comprising biscitraconimide, bisitaconimide, and/or citraconimido-itaconimide | — | 2011-11-01 |
| 7954643 | Use of a derivative of aspartic acid as a collector in froth flotation processes | Elisabeth Henriksson, Anders Klingberg | 2011-06-07 |
| 6624327 | Process for preparing betaines | Christian Blaufelder, Reinhard Broucek, Axel Carstens | 2003-09-23 |
| 6159894 | Catalyst for dehydrogenation of amino alcohols to amino carboxylic acids or of ethylene glycol (derivatives) to oxycarboxylic acids, method for their production and their use | Manfred Bergfeld | 2000-12-12 |
| 5977350 | Process for the oxidation of di-, tri-, oligo- and polysaccharides into polyhydroxycarboxylic acids | Manfred Bergfeld | 1999-11-02 |
| 5436346 | Process for the preparation of benzothiazolyl-2-sulphenamides | Manfred Bergfeld | 1995-07-25 |
| 5139990 | Process for the preparation of a resulfided catalyst | Jan de Jong, Johannes W. F. M. Schoonhoven, Antonius Johannes van Hengstum | 1992-08-18 |
| 5124450 | Process for the preparation of 2-aminodithiothiazoles and 2-aminotrithiothiazoles | Manfred Bergfeld | 1992-06-23 |
| 5021603 | Thiuram polysulfide production | Manfred Bergfeld, Hans Zengel | 1991-06-04 |
| 5017535 | Process for the preparation of a presulfided and sulfided catalyst | Johannes W. F. M. Schoonhoven, Sonja Eijsbouts, Jacobus J. L. Heinerman | 1991-05-21 |
| 4898978 | Process for the preparation of N,N'-disubstituted guanidines | Manfred Bergfeld, 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 | Manfred Bergfeld | 1989-08-01 |
| 4831171 | Process for synthesizing an ammonia complex of zinc bisdithiocarbamate | Manfred Bergfeld | 1989-05-16 |
| 4670556 | Process for the production of thiazolyl-2-sulphenamides | Hans Zengel, Manfred Bergfeld | 1987-06-02 |
| 4558135 | Process for the preparation of dithiazolyl disulfides | Hans Zengel, Manfred Bergfeld | 1985-12-10 |
| 4468526 | Process for the preparation of thiuram disulfides | Hans Zengel, Manfred Bergfeld | 1984-08-28 |
| 4459424 | Process for the preparation of thiuram disulfides | Hans Zengel, Manfred Bergfeld | 1984-07-10 |
| 4307236 | Process for the preparation of dithiazole-disulfides | Hans Zengel, Manfred Bergfeld | 1981-12-22 |