Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4356289 | Polymeric N-halogenoamides on the basis of acrylamide and methacrylamide | Manfred Bergfeld, Rainer Zielke | 1982-10-26 |
| 4346233 | Process for the preparation of ureas | Manfred Bergfeld, Rainer Zielke | 1982-08-24 |
| 4342707 | Process for the preparation of bis-N-chloramides | Manfred Bergfeld | 1982-08-03 |
| 4332601 | Method for making silica fibers | Arno Wegerhoff, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken +1 more | 1982-06-01 |
| 4332600 | Method for making silica fibers | Arno Wegerhoff, Walter Brodowski, Heinz Beck, Ernst Seeberger, Gerhard Steenken +1 more | 1982-06-01 |
| 4317947 | Process for the preparation of nitrosobenzene | Manfred Bergfeld | 1982-03-02 |
| 4316031 | Process for the preparation of 2-mercaptobenzothiazole | Manfred Bergfeld, Heinz Praetorius | 1982-02-16 |
| 4314089 | Process for the preparation of nitrosobenzene | Manfred Bergfeld, Werner Klostermeier | 1982-02-02 |
| 4307236 | Process for the preparation of dithiazole-disulfides | Manfred Bergfeld, Ludwig Eisenhuth | 1981-12-22 |
| 4301257 | Polyfunctional isocyanates free of alkali and urea groups | Rainer Zielke, Manfred Bergfeld | 1981-11-17 |
| 4289869 | Mixture hardening under the influence of air moisture and a process for production of polyisocyanate-poly-addition products or of cross-linked polyepoxides | Michael Wallrabenstein, Walter Brodowski | 1981-09-15 |
| 4275223 | Preparation of trans-cyclohexane-1,4-diurethanes | Manfred Bergfeld | 1981-06-23 |
| 4259258 | Preparation of bis-n-chloramides of cycloaliphatic carboxylic acids | Manfred Bergfeld | 1981-03-31 |
| 4256869 | Polyurethanes from trans-cyclohexane-1,4-diisocyanate | Helmut Schulze, Walter Brodowski, Franciscus J. Huntjens, Jan A. J. Schutijser, Peter Hentschel | 1981-03-17 |
| 4238404 | Process for the preparation of isocyanate derivatives of aliphatic, cycloaliphatic, and araliphatic compounds | Manfred Bergfeld, Rainer Zielke, Erich Klimesch | 1980-12-09 |
| 4223145 | Process for the preparation of organic mono- and polyisocyanates | Peter Hentschel, Manfred Bergfeld | 1980-09-16 |
| 4210602 | Process for the preparation of asymmetrical N-phenyl-N'-substituted para-phenylene diamines | Manfred Bergfeld | 1980-07-01 |
| 4203916 | Preparation of trans cyclohexane 1,4 diisocyanate | Manfred Bergfeld | 1980-05-20 |