Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8075866 | Sulfur degassing process | Alfred E. Keller, Sriram Ramani, Terry D. Pruitt, Michael D. Smith | 2011-12-13 |
| 7998451 | Sulfur degassing process | Alfred E. Keller, Sriram Ramani, Terry D. Pruitt, Michael D. Smith | 2011-08-16 |
| 7658906 | Sulfur recovery plant | Alfred E. Keller, Sriram Ramani, Larry D. Swinney | 2010-02-09 |
| 7560088 | Compact sulfur recovery plant and process | Alfred E. Keller, Sriram Ramani, Joe D. Allison, Steven E. Lusk, Larry D. Swinney +4 more | 2009-07-14 |
| 7501111 | Increased capacity sulfur recovery plant and process for recovering elemental sulfur | Alfred E. Keller, Sriram Ramani, Joe D. Allison, Steven E. Lusk, Larry D. Swinney +1 more | 2009-03-10 |
| 7226572 | Compact sulfur recovery plant and process | Alfred E. Keller, Sriram Ramani, Joe D. Allison, Steven E. Lusk, Larry D. Swinney +4 more | 2007-06-05 |
| 5935548 | Method for removing hydrogen sulfide from molten sulfur | David A. Franklin | 1999-08-10 |