Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5260488 | N.sup.1 -trifluoroalkyl substituted 2-nitro-p-phenylenediamine dyes | Mu-Ill Lim | 1993-11-09 |
| 5256823 | Quarternized monoalkylenediamine nitrobenzene compounds and their use as dyes for keratinaceous fibers | Alexander Chan | 1993-10-26 |
| 5199955 | M-phenylenediamine coupler and oxidative dye compositions containing same | Mu-Ill Lim, Alexander Chan | 1993-04-06 |
| 5186716 | N.sup.1 trifluoroalkyl substituted 2-nitro-p-phenylenediamine dyes and hair dyeing compositions and methods thereof | Mu-Ill Lim | 1993-02-16 |
| 5183941 | Hair dye coupler compounds | Alexander Chan, Lana Hochman | 1993-02-02 |
| 5169403 | Direct dyes having a quaternary center with a long aliphatic chain | Alexander Chan | 1992-12-08 |
| 5135543 | Quaternized monoalkylenediamine nitrobenzene compounds and their use as dyes for keratinaceous fibers | Alexander Chan | 1992-08-04 |
| 5073173 | Dye couplers | Alexander Chan, Lana Hochman | 1991-12-17 |
| 5024673 | Nitroaniline dyes with a cyano substituent group | Lana Hochman | 1991-06-18 |
| 4980158 | Nitroaniline dyes with a cyano substituent group | Lana Hochman | 1990-12-25 |
| 4980505 | Organic synthesis | Lana Hochman | 1990-12-25 |
| 4975092 | Processes for coloring and/or conditioning hair | Alexander Chan, Leszek J. Wolfram | 1990-12-04 |