Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4990241 | Hydrotreating process to minimize catalyst slumping | Robert D. Buttke, Frank W. Pickell | 1991-02-05 | $26,018,000 |
| 4808289 | Resid hydrotreating with high temperature flash drum recycle oil | Norman K. McDaniel, Nicholas C. Vasti, Norman R. Woods | 1989-02-28 | $6,007,000 |
| 4753721 | Process for resid hydrotreating employing feed distributor | Norman K. McDaniel, Paul E. Stelly, William E. McWhirter, Jr., Duncan E. Atkinson, Richard D. Petersen | 1988-06-28 | $7,803,000 |