Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990686 | Process for the purification of crude 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane | Gunter Rauchschwalbe, Heinz U. Blank | 1991-02-05 |
| 4613692 | Process for the preparation of cinnamic acids which are optionally substituted in the nucleus | Bernhard Beitzke, Heinz U. Blank | 1986-09-23 |