Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663366 | Process for the synthesis of 4,5-diaminopyrazole derivatives useful for dyeing hair | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1997-09-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663366 | Process for the synthesis of 4,5-diaminopyrazole derivatives useful for dyeing hair | Hans Neunhoeffer, Thomas Clausen, Wolfgang Balzer | 1997-09-02 |