Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5125975 | Purification of opal and opal oleate to remove aniline | Joseph D. Maciejewski, John Parker | 1992-06-30 |
| 5004504 | Transparent iron oxide pigments | Rodney Schroeder | 1991-04-02 |
| 4944806 | Rigmentary salt of a triphenylmethane compound and process for making same | Floyd G. Spence, Brian D. Teunis | 1990-07-31 |