Patents per Year
Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5814110 | Chemical compositions and use as fuel additives | Kenneth W. Bartz, Jacqueline D. Bland, Richard Dix Kerwood, Edwin William Lehmann, Kenneth Lewtas +3 more | 1998-09-29 | $161,100,000 |
| 5425789 | Chemical compositions and their use as fuel additives | Kenneth Lewtas, Edwin William Lehmann, John Edward Maddox | 1995-06-20 | $75,432,000 |
| 5364419 | Fuel oil additives | Robert D. Tack, Darryl R. T. Smith | 1994-11-15 | $58,419,000 |