Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6624117 | Heat sensitive recording material | Michael Heneghan, Roy Alan Kirk, James Taylor, John Whitworth, Robert M. O'Neil | 2003-09-23 |
| 6071853 | Crystalline fluoran compound | Roy Alan Kirk, Jonathon Gawtrey, Michael Heneghan, John Whitworth, Ian Antony Dearden +1 more | 2000-06-06 |
| 5936119 | Chemical process | John Whitworth | 1999-08-10 |
| 5917086 | Purification process | James Taylor, John Whitworth | 1999-06-29 |
| 5908961 | Production of aminophenols | John Whitworth, Ian Antony Dearden, Steven Joseph Walsh | 1999-06-01 |
| 5166350 | Process for the manufacture of fluoran compounds | Davor Bedekovic, Jerry L. Pool, Brian John Williams, Robert Garner | 1992-11-24 |
| 4533499 | Process for the production of triaryl methane compounds | Malcolm C. Clark, Derrick A. Hart | 1985-08-06 |
| 4348330 | Process for the production of sulphinates of benzhydrol compounds | Malcolm C. Clark | 1982-09-07 |