Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4923686 | Process for the extraction of metal values | Raymond F. Dalton, Peter M. Quan, David Stewart | 1990-05-08 |
| 4775763 | Metal extractants | Raymond F. Dalton, Peter M. Quan, David Stewart | 1988-10-04 |
| 4683310 | Pyridine dicarboxylic ester metal extractants | Raymond F. Dalton, Peter M. Quan, David Stewart | 1987-07-28 |
| 4525330 | Process for the extraction of metal values and novel metal extractants | Raymond F. Dalton, Peter M. Quan, David Stewart | 1985-06-25 |
| 4454693 | Continuous-unloading silo | — | 1984-06-19 |
| 4222935 | Process for the manufacture of aromatic nitriles | Antony Greenall, Peter M. Quan | 1980-09-16 |
| 4192800 | Process for the manufacture of aromatic nitriles | Nigel Hall | 1980-03-11 |