Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6506501 | Foil for wrapping hair ends | Dieter Schonert, Gernot Mecks | 2003-01-14 |
| 5679332 | Hair keratin-reducing cysteine esters and compositions for permanent shaping of hair based on same | Hans-Juergen Braun, Guenther Lang | 1997-10-21 |
| 5637295 | Methods and compositions for permanent shaping of hair | Guenther Lang, Kirstin Uhl, Gerhard Sendelbach | 1997-06-10 |
| 5635170 | Composition and method for permanent shaping of hair | Gunther Lang | 1997-06-03 |
| 5554362 | Composition and process for the permanent shaping of hair | Hans-Juergen Braun | 1996-09-10 |
| 5503826 | Hair keratin-reducing mono, di- and triglycerides of cysteine and compositions | Guenther Lang, Hans-Juergen Braun | 1996-04-02 |
| 4954619 | O-benzyl-N-hydroxyalkyl derivatives of chitosan and nail polish containing the same | Gunther Lang, Hans-Rudi Lenz | 1990-09-04 |
| 4931271 | Cosmetic compostions based upon N-hydroxybutyl-chitosans, N-hydroxybutyl-chitosans as well as processes for the production thereof | Gunther Lang, Eugen Konrad, Harald Wendel, Hans-Rudi Lenz | 1990-06-05 |
| 4923977 | Cosmetic composition based upon N-hydroxypropylisopropylether chitosans as well as new N-hydroxypropylisopropylether derivatives of chitosan | Gunther Lang, Hans-Rudi Lenz | 1990-05-08 |
| 4845204 | Cosmetic compositions on the basis of alkyl-hydroxypropyl-substituted chitosan derivatives, new chitosan derivatives and processes for the production thereof | Gunther Lang, Hans-Rudi Lenz, Eugen Konrad, Lothar Breuer, Dietrich Hoch | 1989-07-04 |
| 4835266 | Cosmetic compositions based upon n-hydroxypropyl-chitosans, new n-hydroxypropyl-chitosans, as well as processes for the production thereof | Gunther Lang, Harald Wendel, Eugen Konrad, Hans-Rudi Lenz, Jurgen Titze | 1989-05-30 |
| 4780310 | Cosmetic compositions based upon N-hydroxypropyl-chitosans, new N-hyroxypropyl-chitosans, as well as processes for the production thereof | Guther Lang, Harald Wendel, Eugen Konrad, Hans-Rudi Lenz, Jurgen Titze | 1988-10-25 |