Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4714689 | Process for the regeneration of catalysts for the gas-phase reduction of aromatic nitro compounds | Zoltan Kricsfalussy, Helmut Waldmann, Joachim Schneider, Harald Medem | 1987-12-22 |
| 4705843 | Process for the production of substituted polyaryl ethers | Johann Grolig, Helmut Waldmann | 1987-11-10 |
| 4593116 | Process for the production of urethanes | Johann Grolig, Robert Becker, Helmut Waldmann | 1986-06-03 |
| 4582923 | Process for the production of urethanes | Robert Becker, Johann Grolig, Helmut Waldmann | 1986-04-15 |
| 4370275 | Process for the preparation of carbonic acid esters | Robert Becker, Johann Grolig, Helmut Waldmann | 1983-01-25 |
| 4339592 | Process for the production of urethanes | Robert Becker, Christian Rasp, Johann Grolig | 1982-07-13 |
| 4304922 | Process for the preparation of urethane | Robert Becker, Johann Grolig, Christian Rasp | 1981-12-08 |