Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6380385 | Process for the preparation of pure melamine | Lorenzo Canzi, Gerhard Coufal | 2002-04-30 |
| 5721363 | Process for the production of highly pure melamine | Lorenzo Canzi, Aldo Canzi, Gerhard Coufal, Silvano Giacomuzzo, Mario Virardi | 1998-02-24 |
| 5481035 | Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates and substituted isocyanates | Gerhard Stern, Markus Rossler | 1996-01-02 |
| 5414083 | Method for the production of N-cyclic and N,N'-dicyclic ureas and their use as chemical solvents | Kurt A. Hackl, Markus Rossler, Gerhard Stern | 1995-05-09 |
| 5360601 | Process for the preparation of isocyanic acid by the decomposition of N,N-disubstituted ureas | Kurt A. Hackl, Erich Schulz, Gerhard Stern, Heinz Falk | 1994-11-01 |
| 5223635 | Preparation of organic compounds using as a reactant an adduct of isocyanic acid and a tertiary amine or an ether | Gerhard Stern, Erich Schulz | 1993-06-29 |
| 5091553 | Process for the preparation of substituted isocyanates | Gerhard Stern, Erich Schulz, Markus Rossler | 1992-02-25 |
| 5078980 | Process for the removal of isocyanic acid from a mixture of isocyanic acid and ammonia | Gerhard Stern, Erich Schulz | 1992-01-07 |
| 5043444 | Process for the preparation of asymmetrically substituted ureas | Gerhard Stern, Markus Rossler | 1991-08-27 |