Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12297310 | Methods for chromium catalyst activation using oxygen-enriched fluidization gas | Ralph W. Romig, James E. Hein, Zhihui Gu | 2025-05-13 |
| 11584806 | Methods for chromium catalyst activation using oxygen-enriched fluidization gas | Ralph W. Romig, James E. Hein, Zhihui Gu | 2023-02-21 |