Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10539378 | Heat exchanger | Jacob Diffey, James Green, Chris McNab | 2020-01-21 |
| RE35461 | Lubricating oil additives | Joseph M. Swietlik | 1997-02-25 |
| 5534168 | Preparation of overbased magnesium sulphonates | John A. Cleverley, Robert A. Wardle, Joseph M. Swietlik, Jeremy Spencer | 1996-07-09 |
| 5137648 | Overbased metal sulphonate composition | Marc Vernet, Graham W. Hamey | 1992-08-11 |
| 5112506 | Overbased metal sulphonate composition | Marc Vernet, Graham W. Hamey | 1992-05-12 |
| 5089155 | Overbased magnesium sulphonate composition | Marc Vernet, Graham W. Hamey | 1992-02-18 |
| 5069804 | Lubricating oil additives | Joseph M. Swietlik | 1991-12-03 |
| 4957642 | Magnesium phenate detergents | John A. Cleverley, Philip Skinner, Gaynor M. Miasik | 1990-09-18 |
| 4867890 | Lubricating oil compositions containing ashless dispersant, zinc dihydrocarbyldithiophosphate, metal detergent and a copper compound | Terence Colclough, Frederick A. Gibson | 1989-09-19 |
| 4839094 | Overbased alkali metal additives | John A. Cleverley | 1989-06-13 |
| 4617954 | Valve assemblies | Nigel J. Petts | 1986-10-21 |
| 4557872 | Basic alkaline earth metal sulphonates | John A. Cleverley, Dennis J. Simpkin | 1985-12-10 |