Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5749928 | Method for reducing emissions from or increasing the utilizable energy of fuel for powering internal combustion engines | W. Robert Epperly, Barry N. Sprague, Danny T. Kelso | 1998-05-12 |
| 5215652 | Method for regenerating, replacing or treating the catalyst in a hydroprocessing reactor | W. Robert Epperly, Barry N. Sprague, Danny T. Kelso | 1993-06-01 |
| 4992249 | Reduction of nitrogen- and carbon-based pollutants through the use of urea solutions | — | 1991-02-12 |
| 4927612 | Reduction of nitrogen- and carbon-based pollutants | — | 1990-05-22 |
| 4892562 | Diesel fuel additives and diesel fuels containing soluble platinum group metal compounds and use in diesel engines | Barry N. Sprague | 1990-01-09 |
| 4891050 | Gasoline additives and gasoline containing soluble platinum group metal compounds and use in internal combustion engines | Barry N. Sprague | 1990-01-02 |
| 4752302 | Method and composition for improving flame combustion of liquid carbonaceous fuels | Barry N. Sprague | 1988-06-21 |
| 4751065 | Reduction of nitrogen- and carbon-based pollutants | — | 1988-06-14 |
| 4719092 | Reduction of nitrogen-based pollutants through the use of urea solutions containing oxygenated hydrocarbon solvents | — | 1988-01-12 |