Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364727 | Positive-charging organic photoconductor for liquid electrophotography | — | 1994-11-15 |
| 5320923 | Reusable, positive-charging organic photoconductor containing phthalocyanine pigment, hydroxy binder and silicon stabilizer | — | 1994-06-14 |
| 5141837 | Method for preparing coating compositions containing photoconductive perylene pigments | William T. Gruenbaum | 1992-08-25 |
| 5112711 | Electrophotographic recording elements containing a combination of titanyl phthalocyanine-type pigments | Thomas Klose | 1992-05-12 |
| 5055368 | Electrophotographic recording elements containing titanyl phthalocyanine pigments and their preparation | Thomas Klose | 1991-10-08 |
| 5019473 | Electrophotographic recording elements containing photoconductive perylene pigments | William T. Gruenbaum | 1991-05-28 |
| 4968571 | Electrophotographic recording elements containing a combination of photoconductive perylene materials | William T. Gruenbaum, Jeanne E. Kaeding | 1990-11-06 |