Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6271184 | Viscosity improvers for lubricating oil-compositions | Charles P. Bryant | 2001-08-07 |
| 6124249 | Viscosity improvers for lubricating oil compositions | Charles P. Bryant | 2000-09-26 |
| 5747433 | Oil concentrates of polymers with improved viscosity | Carmen V. Luciani, Richard M. Lange | 1998-05-05 |
| 5399275 | Environmentally friendly viscosity index improving compositions | Richard M. Lange, Conrad A. Mamajek | 1995-03-21 |