Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206433 | Preparation of formic acid | Johannes E. Schmidt, Hans Kiefer | 1993-04-27 |
| 4314947 | Process for completing the esterification of carboxylic acids with alcohols | Josef Gnad, Guenter Dinkhauser, Eberhard Schaefer | 1982-02-09 |
| 4218568 | Preparation of formic acid | Johannes E. Schmidt, Hans Kiefer | 1980-08-19 |
| 4217460 | Isolation of formic acid from its aqueous solutions | Johannes E. Schmidt, Hans Kiefer | 1980-08-12 |
| 4198531 | Manufacture of p-alkylphenols | Franz Merger, Max Strohmeyer, Gerhard Sandrock, Ludwig Schroff, deceased, Gerhard Nestler | 1980-04-15 |