Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8977421 | System and method for determining a lubricant discard interval | Todd Dvorak, Dewey P. Szemenyei | 2015-03-10 |
| 8965625 | System and method for extending a lubricant discard interval | Todd Dvorak, Dewey P. Szemenyei | 2015-02-24 |
| 7863228 | Additives for lubricants and fuels | John T. Loper, Paul G. Griffin, David A. Hutchison | 2011-01-04 |
| 7361629 | Additives for lubricants and fuels | John T. Loper, Paul G. Griffin, David A. Hutchison | 2008-04-22 |