Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31126 | Quaternary ammonium compounds in pretreatment of hair before shampooing with an anionic shampoo | Kathleen A. O'Cull, Thomas Schamper | 1983-01-18 |
| RE30874 | Quaternary ammonium compounds in pretreatment of hair before shampooing with an anionic shampoo | Kathleen A. O'Cull, Thomas Schamper | 1982-03-02 |
| 4297098 | Method for gradual coloring of hair to a light brown shade and preparations for use therein | Thomas Schamper | 1981-10-27 |