Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5026627 | High strength alkali blue pigment toner useful in both oil-based and water-based systems | Thomas L. Praamsma | 1991-06-25 |
| 4789404 | Soft textured high strength alkali blue pigment and process for preparing the same | James J. Krikke | 1988-12-06 |
| 4469519 | Soft textured high strength Alkali Blue pigment | — | 1984-09-04 |
| 4456485 | Process for the preparation of easily dispersible, high color strength, powdered alkali blue pigments | Joachim Jesse | 1984-06-26 |
| 4383865 | Soft textured high strength alkali blue pigment | — | 1983-05-17 |
| 4373962 | Surface treated alkali blue pigment | — | 1983-02-15 |