Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648306 | Process for producing sorbents based on smectites to absorb liquids | Otto Haubensak, Max Eisgruber | 1997-07-15 |
| 5637552 | Process for producing neutral to alkali color developer pigments | Friedrich Ruf | 1997-06-10 |