Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4540635 | Modified colophony rosins, a process for their preparation, their use and paper-sizing agents containing such modified colophony rosins | Helmut Ronge, Wolfgang Schoerkhuber | 1985-09-10 |