Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5266078 | Enhancement of fluorescent whitening agents: water-soluble phosphonates and carboxylates for coating paper | Ulrich Welkener, Thord Hassler | 1993-11-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5266078 | Enhancement of fluorescent whitening agents: water-soluble phosphonates and carboxylates for coating paper | Ulrich Welkener, Thord Hassler | 1993-11-30 |