Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370805 | Chlorine-free diesel engine lubricating composition | Nancy K. Smrcka | 1994-12-06 |
| 5244591 | Lubricating oil compositions for internal combustion engines having silver bearing parts | — | 1993-09-14 |