Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6207624 | Engine oil having dispersant and aldehyde/epoxide for improved seal performance, sludge and deposit performance | Carl F. Stachew, William D. Abraham, James R. Shanklin, Jr., Gordon Lamb | 2001-03-27 |
| 6121211 | Engine oil having dithiocarbamate and aldehyde/epoxide for improved seal performance, sludge and deposit performance | Carl F. Stachew, William D. Abraham, James R. Shanklin, Jr., Gordon Lamb | 2000-09-19 |
| 6001783 | Mixed polysulfides and lubricants and functional fluids containing the same | John S. Manka, William D. Abraham, Stephen H. Roby, Richard Yodice | 1999-12-14 |
| 5902776 | Additive compositions for lubricants and functional fluids | Brent R. Dohner | 1999-05-11 |
| 5834407 | Lubricants and functional fluids containing heterocyclic compounds | John S. Manka, Mohamed G. Fahmy | 1998-11-10 |
| 5726132 | Oil composition for improving fuel economy in internal combustion engines | Stephen H. Roby, John S. Manka, William D. Abraham | 1998-03-10 |
| 5712230 | Additive compositions having reduced sulfur contents for lubricants and functional fluids | William D. Abraham, John S. Manka, Stephen H. Roby | 1998-01-27 |
| 5705458 | Additive compositions for lubricants and functional fluids | Stephen H. Roby, William D. Abraham, John S. Manka | 1998-01-06 |
| 5693598 | Low-viscosity lubricating oil and functional fluid compositions | William D. Abraham, Brent R. Dohner, John S. Manka, Stephen H. Roby | 1997-12-02 |
| 5674820 | Additive compositions for lubricants and functional fluids | John S. Manka, William D. Abraham, Stephen H. Roby, Craig D. Tipton | 1997-10-07 |