Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5573658 | Low brightness functional pigment from process by-product | Albert C. Kunkle, Robert E. Hardy | 1996-11-12 |
| 5385239 | Low brightness functional pigment from process by-product | Albert C. Kunkle, Robert E. Hardy | 1995-01-31 |
| 5190615 | Low brightness functional pigment from process by-product | Albert C. Kunkle, Robert E. Hardy | 1993-03-02 |
| 5154767 | Low brightness functional pigment from process by-product | Albert C. Kunkle, Robert E. Hardy | 1992-10-13 |
| 5147458 | Structured pigment from high TiO.sub.2 /Fe.sub.2 O.sub.3 kaolinite reject material | Robert E. Hardy, Albert C. Kunkle | 1992-09-15 |