Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6855174 | Couplers for use in oxidative hair dyeing | Mu-Ill Lim, Yuh-Guo Pan | 2005-02-15 |
| 6750337 | Couplers for use in oxidative hair dyeing | Mu-Ill Lim, Yuh-Guo Pan | 2004-06-15 |
| 6379399 | Oxidation hair dyeing systems and process for providing more equalized coloration on new and old growth hair | Michael Wong | 2002-04-30 |
| 6313313 | Synthesis of melanoquaternary compounds and their use as hair dyes and for skin treatment | Giuseppe Prota | 2001-11-06 |
| 6160127 | Process for the preparation of substituted indoles | Giuseppe Prota | 2000-12-12 |
| 5980586 | Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols | Guiseppe Prota | 1999-11-09 |
| 5961991 | Melanoquaternary compounds and their use as hair dyes and for skin treatment | Giuseppe Prota | 1999-10-05 |
| 5827330 | Synthesis of quarternary melanin compounds and their use as hair dyes or for skin treatment | Giuseppe Prota | 1998-10-27 |
| 5792220 | Dyeing hair with melanin procursors in the presence of iodate and peroxide | Giuseppe Prota | 1998-08-11 |
| 5704949 | Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole | Giuseppe Prota, Leszek J. Wolfram | 1998-01-06 |
| 5702712 | Melanoquaternary compounds and their use as hair dyes and for skin treatment | Giuseppe Prota | 1997-12-30 |
| 5686084 | Synthesis of quaternary melanin compounds and their use as hair dyes or for skin treatment | Giuseppe Prota | 1997-11-11 |
| 5628799 | Hair dying methods and kits which contain a dopa species, reactive direct dye, and a ferricyanide oxidant | Giuseppe Prota | 1997-05-13 |
| 5603734 | Hair dyeing with persulfate oxidants and catechols | Guiseppe Prota | 1997-02-18 |
| 5584889 | Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols | Guiseppe Prota | 1996-12-17 |
| 5486619 | Method of producing DAI from DOPA, using one reaction vessel | Yuh-Guo Pan, Mu-Ill Lim, Linas R. Stasaitis | 1996-01-23 |
| 5474578 | Erasable hair dyeing process | Alexander Chan, Alice Mayer, Jia-Shen Wang, Mu-Ill Lim | 1995-12-12 |
| 5441542 | Process and kit for post-oxidative treatment of permanently dyed hair | Giuseppe Prota | 1995-08-15 |
| 5435810 | Hair dyeing process with aminoalkylthio substituted dihydroxybenzene and oxidative agents | Guiseppe Prota | 1995-07-25 |
| 5413612 | Composition and method for dyeing hair with indolic compounds in the presence of a chlorite oxidant | — | 1995-05-09 |
| 5374288 | Oxidative hair dyeing method, composition, and kit utilizing hydroxyl substituted benzothiazines | Guiseppe Prota | 1994-12-20 |
| 5368610 | Use of metal salts and chelates together with chlorites as oxidants in hair coloring | Alexander Chan, Ciuseppe Prota | 1994-11-29 |
| 5316551 | Oxidative hair dyeing process with catalytic pretreatment | — | 1994-05-31 |
| 5279618 | Process and kit for dyeing hair | Giuseppe Prota, Leszek J. Wolfram | 1994-01-18 |
| 5279617 | Process and kit for dyeing hair | Giuseppe Prota, Leszek J. Wolfram | 1994-01-18 |