Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198558 | Process for the preparation of triphenylmethane dyes | Charles J. Zullig | 1993-03-30 |
| H935 | Compositions for oil-base drilling fluids | — | 1991-07-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198558 | Process for the preparation of triphenylmethane dyes | Charles J. Zullig | 1993-03-30 |
| H935 | Compositions for oil-base drilling fluids | — | 1991-07-02 |