Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5814110 | Chemical compositions and use as fuel additives | Kenneth W. Bartz, David P. Gillingham, Richard Dix Kerwood, Edwin William Lehmann, Kenneth Lewtas +3 more | 1998-09-29 |
| 5487763 | Fuel compositions | Iain More, Kenneth Lewtas, Sally J. Ayres | 1996-01-30 |
| 5478368 | Additives for distillate fuels and distillate fuels containing them | Kenneth Lewtas | 1995-12-26 |
| 5441545 | Middle distillate compositions with improved low temperature properties | Kenneth Lewtas, Robert D. Tack, Albert Rossi | 1995-08-15 |
| 5011505 | Flow improvers and cloud point depressants | Kenneth Lewtas | 1991-04-30 |