Issued Patents All Time
Showing 26–49 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5279313 | Two component composition and method for bleaching hair | Wolfgang Balzer | 1994-01-18 |
| 5246019 | Process for bleaching hair under the influence of light | Robin E. Godfrey, Wolfgang Balzer | 1993-09-21 |
| 5224965 | Composition for the oxidative dyeing of hair and new 5-halogen-2,4-diamino alkylbenzenes | Alexa Weinges, Wolfgang Balzer | 1993-07-06 |
| 5145482 | Hair dye compositions based on 2,5-diamino-6-nitropyridine derivatives | Eugen Konrad | 1992-09-08 |
| 5132461 | Process for the production of 4-[ethyl-(2'-hydroxyethyl)-amino]-1-[(2'-hydroxyethyl)-amino]-2-nitro-be nzene | Isolde Lowe | 1992-07-21 |
| 5061289 | Oxidation hair dye composition containinng diaminopyrazol derivatives and new diaminopyrazol derivatives | Ute Kern, Hans Neunhoeffer | 1991-10-29 |
| 5037446 | 2-nitroaniline derivatives and hair dyeing compositions containing same | Eugen Konrad, Hans-Jurgen Braun, Herbert Mager | 1991-08-06 |
| 5030241 | Use of 2,6-dinitro-aniline derivatives in hair dyes and new 2,6-dinitro-aniline derivatives | Eugen Konrad | 1991-07-09 |
| 4997451 | Oxidative hair dyeing compositions based on 4-aminophenol derivatives and new 4-aminophenol derivatives | Wolfgang Balzer, Anke Flohr | 1991-03-05 |
| 4975093 | Hair dyeing compositions containing 2,6-dinitro-phenol-derivatives | Wolfgang Balzer, Gunther Lang | 1990-12-04 |
| 4960955 | Process for making 4-chloro-2-methyl-5-nitro-phenol | David Rose | 1990-10-02 |
| 4950302 | Process for the production of 2,5-diamino-6-nitro-pyridine derivatives, their use in hair dye compositions and new 2,5-diamino-6-nitropyridine derivatives | Eugen Konrad | 1990-08-21 |
| 4921504 | 4-(N-ethyl-N-2-hydroxyethyl)-amino-1-(2 hydroxyethyl)-amino-2-nitrobenzene and compositions for dyeing hair containing the same | Eugen Konrad | 1990-05-01 |
| 4900869 | Process for the production of 4-[ethyl-(2'-hydroxyethyl)-amino]-1-[(2'-hydroxyethyl)-amino]-2-nitroben zene | Isolde Lowe | 1990-02-13 |
| 4886516 | Diaminotetrafluoroethoxybenzenes, process for producing same and hair coloring agents containing same | Eugen Konrad | 1989-12-12 |
| 4854935 | 5-alkoxy-2,4-diamino-alkyl-benzenes and hairdye compositions based on 5-alkoxy-2,4-diamino-alkyl-benzenes | Eugen Konrad | 1989-08-08 |
| 4845294 | Diaminotetrafluoroethoxybenzenes | Eugen Konrad | 1989-07-04 |
| 4835314 | 2-nitroaniline derivatives | Eugen Konrad, Hans-Jurgen Braun, Herbert Mager | 1989-05-30 |
| 4797130 | Oxidative hair dye composition based on 4-amino-2-aminomethyl-phenols | Eugen Konrad | 1989-01-10 |
| 4713080 | Method and composition for the dyeing of hair with 2,6-diamino-pyridine derivatives | Eugen Konrad | 1987-12-15 |
| 4704474 | 1,4-diamino-5-chloro-2-nitrobenzene derivatives, processes for their production and compositions containing the same for the coloration of hair | Eugen Konrad | 1987-11-03 |
| 4661114 | 3-Amino-5-hydroxypyridine derivatives and hair coloring compositions containing the same | Eugen Konrad | 1987-04-28 |
| 4629467 | Use of p-ureidoalkylamino-nitrobenzene derivatives in hair dyeing compositions and new p-ureidoalkylamino-nitrobenzene derivatives | Eugen Konrad | 1986-12-16 |
| 4473375 | Composition and method for the coloring of hair | — | 1984-09-25 |