Issued Patents 1989
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886516 | Diaminotetrafluoroethoxybenzenes, process for producing same and hair coloring agents containing same | Thomas Clausen | 1989-12-12 |
| 4883656 | Composition and method for the oxidative dyeing of hair | Herbert Mager, Axel Hoffmann | 1989-11-28 |
| 4854935 | 5-alkoxy-2,4-diamino-alkyl-benzenes and hairdye compositions based on 5-alkoxy-2,4-diamino-alkyl-benzenes | Thomas Clausen | 1989-08-08 |
| 4855130 | Hair treating compositions and processes for improving the condition of hair | Herbert Mager, Dietrich Hoch | 1989-08-08 |
| 4845204 | Cosmetic compositions on the basis of alkyl-hydroxypropyl-substituted chitosan derivatives, new chitosan derivatives and processes for the production thereof | Gunther Lang, Gerhard Maresch, Hans-Rudi Lenz, Lothar Breuer, Dietrich Hoch | 1989-07-04 |
| 4845294 | Diaminotetrafluoroethoxybenzenes | Thomas Clausen | 1989-07-04 |
| 4840639 | Agent for dyeing hair | Hans Husemeyer, Herbert Mager | 1989-06-20 |
| 4835314 | 2-nitroaniline derivatives | Thomas Clausen, Hans-Jurgen Braun, Herbert Mager | 1989-05-30 |
| 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, Hans-Rudi Lenz, Jurgen Titze | 1989-05-30 |
| 4822598 | Cosmetic agent on the basis of quaternary chitosan derivatives, novel quaternary chitosan derivatives as well as processes for making same | Gunther Lang, Harald Wendel | 1989-04-18 |
| 4797130 | Oxidative hair dye composition based on 4-amino-2-aminomethyl-phenols | Thomas Clausen | 1989-01-10 |