Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885386 | Process for the synthesis of 3-chloro-2,4,5-trifluorobenzoic acid | James N. Wemple, Gregory Lee Karrick | 1989-12-05 |
| 4824610 | Colorants for ball-point pen and ribbon inks | Reinhard Sappok, Louis R. de Alvare | 1989-04-25 |
| 4800043 | Colorants for ball point pen and ribbon inks derived from pararosaniline process residue | Robert J. Allen, Louis Rolando de Alvare | 1989-01-24 |