Issued Patents All Time
Showing 25 most recent of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12398104 | Odorless thiols for permanent waving, straightening and depilatory applications | Guiru Zhang, Stephanie Lee Davis, David S. Salloum | 2025-08-26 |
| 12226515 | Method for colouring hair including pretreatment | Lars Siegfried Dahne, Mandy Hecht, Mathias Kurt Herrlein, Katrin Kaestle, Monica Jo Patten | 2025-02-18 |
| 11339295 | Oxidative dye couplers with novel auxochrome substituents and azomethine dyes and leuco forms thereof | Guiru Zhang, Aaron D. Bailey, Megan E. Bucks | 2022-05-24 |
| 11142498 | Keratin dyeing compounds, compositions containing them, and method and use thereof | — | 2021-10-12 |
| 10688033 | Hair colouration formulation | Lars Siegfried Dahne, Gabriella Egri, Mandy Hecht, Mathias Kurt Herrlein, Moritz Klickermann +5 more | 2020-06-23 |
| 10494527 | Cationic direct dyes | Frank Bachmann, Christian Cremer, Beate Froehling, Guiru Zhang, Peter Marte Torgerson | 2019-12-03 |
| 10093807 | Stable yellow imidazolium compounds | Guiru Zhang, Garry Steven Garrett | 2018-10-09 |
| 10034823 | Method of coloring hair with washfast blue imidazolium direct dye compounds | Guiru Zhang, Jielu Zhao | 2018-07-31 |
| 9982138 | Hair color compositions comprising stable violet-blue to blue imidazolium dyes | Guiru Zhang, Jielu Zhao | 2018-05-29 |
| 9943472 | Acid perspiration resistant fluorescent compounds for treating hair | Guiru Zhang | 2018-04-17 |
| 9918919 | Method of coloring hair with washfast yellow imidazolium direct dye compounds | Guiru Zhang, Garry Steven Garrett | 2018-03-20 |
| 9913791 | Method for improving acid perspiration resistance of fluorescent compounds on hair | Guiru Zhang | 2018-03-13 |
| 9872823 | Method for improving fastness properties of fluorescent compounds on hair | Guiru Zhang | 2018-01-23 |
| 9855202 | Compositions for dyeing hair with cationic direct dyes | Guiru Zhang, Peter Marte Torgerson | 2018-01-02 |
| 9849072 | Method of coloring hair with direct dye compounds | Guiru Zhang, Peter Marte Torgerson | 2017-12-26 |
| 9844501 | Compositions for dyeing hair with cationic direct dyes | Guiru Zhang, Peter Marte Torgerson | 2017-12-19 |
| 9839592 | Fluorescent compounds for treating hair | Guiru Zhang | 2017-12-12 |
| 9839593 | Method of coloring hair with direct dye compounds | Guiru Zhang, Peter Marte Torgerson | 2017-12-12 |
| 9758469 | Process for the preparation of 2-substituted-1,4-benzenediamines and salts thereof | Garry Steven Garrett, Heike Gertrud Abel, Armin Osan, John Michael Gardlik, Markus Speckbacher +1 more | 2017-09-12 |
| 9688609 | Telescoping synthesis of 2-methoxymethyl-P-phenylenediamine | Heike Gertrud Abel, Armin Osan, Garry Steven Garrett, John Michael Gardlik, Markus Speckbacher +1 more | 2017-06-27 |
| 9309185 | Process for preparing primary intermediates for dyeing keratin fibers | John Michael Gardlik, Monica Jo Patten, Garry Steven Garrett | 2016-04-12 |
| 9216945 | Methods of synthesizing 2-substituted-1,4-benzenediamine | John Michael Gardlik, Garry Steven Garrett, Guiru Zhang, Robert Edward Shumate, James S. Anderson | 2015-12-22 |
| 9198838 | Porous, dissolvable solid substrate and surface resident coating comprising water sensitive actives | Robert Wayne Glenn, Jr., Kathleen Mary Kaufman, James Charles Dunbar, John Michael Gardlik | 2015-12-01 |
| 9012691 | Process for preparing primary intermediates for dyeing keratin fibers | John Michael Gardlik, Monica Jo Patten, Garry Steven Garrett | 2015-04-21 |
| 8709100 | Hair colorant compositions comprising 2-methoxymethyl-1,4-diaminobenzene and 5-amino-4-chloro-o-cresol, methods, and kits comprising the compositions | Richard Matthew Charles Sutton, Margaret Popp, Stephen Robert Schofield | 2014-04-29 |