Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835266 | Cosmetic compositions based upon n-hydroxypropyl-chitosans, new n-hydroxypropyl-chitosans, as well as processes for the production thereof | Gunther Lang, Gerhard Maresch, Harald Wendel, Eugen Konrad, Hans-Rudi Lenz | 1989-05-30 |