Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695687 | Anhydrous fluorescent whitening agent formulation | Serge Schroeder | 1997-12-09 |
| 5622749 | Fluorescent whitening of paper | Peter Rohringer, Thomas Ehlis | 1997-04-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695687 | Anhydrous fluorescent whitening agent formulation | Serge Schroeder | 1997-12-09 |
| 5622749 | Fluorescent whitening of paper | Peter Rohringer, Thomas Ehlis | 1997-04-22 |