Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5318627 | Process for the preparation of pigment preparations based on C.I. pigment violet 23 | Erwin Dietz | 1994-06-07 |
| 5296033 | Process for the production of pigment preparations based on phythalocyanine pigments | Erwin Dietz | 1994-03-22 |
| 5296034 | Process for the production of copper phthalocyanine pigment preparations of the .alpha. phase | Erwin Dietz | 1994-03-22 |
| 5275653 | Pigment preparations based on dioxazine compounds | Erwin Dietz | 1994-01-04 |