Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4404180 | Manufacture of hydrogen sulfide | Richard S. Madenburg, Douglas M. Paulsrude, Carroll H. Sherman, Frank G. Turpin, Gerry A. Wheatcroft | 1983-09-13 |
| 4332774 | Manufacture of hydrogen sulfide | Richard S. Madenburg, Douglas M. Paulsrude, Carroll H. Sherman, Frank G. Turpin, Gerry A. Wheatcroft | 1982-06-01 |