Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5173281 | Synthesis of a synthetic porous crystalline material | Clarence D. Chang | 1992-12-22 | $20,222,000 |
| 5173461 | Toluene disproportionation catalyst | Robert P. L. Absil, Scott Han, David S. Shihabi, David O. Marler, Clarence D. Chang | 1992-12-22 | $20,222,000 |