Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5518607 | Sulfur removal systems for protection of reforming catalysts | Leslie A. Field, Ann Marie K. Hall, Richard C. Robinson, Robert L. Jacobson, Dennis L. Holtermann | 1996-05-21 |
| 5516421 | Sulfur removal | Dennis L. Holtermann, John V. Heyse | 1996-05-14 |
| 5401386 | Reforming process for producing high-purity benzene | Scott G. Morrison | 1995-03-28 |
| 5322615 | Method for removing sulfur to ultra low levels for protection of reforming catalysts | Dennis L. Holtermann | 1994-06-21 |
| 4830536 | Method and apparatus for tunnel lining | Robert Michael Birch | 1989-05-16 |