Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571426 | Process for the production of maleic anhydride | Fritz Gude | 1986-02-18 |
| 4562264 | Process for the recovery of five-membered ring dicarboxylic acid anhydrides | Fritz Gude | 1985-12-31 |
| 4337234 | Method for preparing sodium bicarbonate and hydrogen chloride | Bernhard Hentschel, Jurgen Ziebarth, Alfred Coenen, Kurt Kosswig | 1982-06-29 |
| 4272502 | Process for preparing gaseous hydrogen chloride from dilute aqueous hydrochloric acid | Willi Ziegenbein | 1981-06-09 |
| 4259309 | Method for obtaining gaseous hydrogen chloride from dilute aqueous hydrochloric acid | Alfred Coenen, Kurt Kosswig | 1981-03-31 |
| 4255356 | Purification of tertiary amines using an adsorbent | Alfred Coenen, Kurt Kosswig, Hans Schuller | 1981-03-10 |
| 4217106 | Alkaline baths containing alkene sulfonates as wetting agents | Wolfgang Schneider, Kurt Niehaves | 1980-08-12 |