Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855343 | Paper size based on finely divided aqueous dispersions | Hans-Juergen Degen, Ulrich Riebeling, Lothar Hoehr | 1989-08-08 |
| 4835212 | Sizing agents for paper based on finely divided aqueous dispersions | Hans-Juergen Degen, Ulrich Riebeling, Lothar Hoehr | 1989-05-30 |