Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5231215 | Method of manufacturing substituted monoamides of dicarboxylic-acid monoalkyl esters | — | 1993-07-27 |
| 4772711 | Method for the preparation of 3-aminoacrylic acid esters | Moustafa El-Chahawi, Wilhelm Vogt | 1988-09-20 |
| 4665218 | Method for the preparation of alkoxymethylene compounds of acetic esters and substituted acetic esters | Wilhelm Vogt | 1987-05-12 |
| 4376866 | Process for the preparation of .alpha.-hydroxymethylene arylacetic acid | Moustafa El-Chahawi, Wilhelm Vogt | 1983-03-15 |
| 4216153 | Method of preparing phthalide | Klaus-Dieter Steffen | 1980-08-05 |