Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6022525 | Preparation of diagnostic agents | Richard A. Johnson, Peter J. Senior, David Heath | 2000-02-08 |
| 6015546 | Preparation of further diagnostic agents | Richard A. Johnson | 2000-01-18 |
| 5993805 | Spray-dried microparticles and their use as therapeutic vehicles | Richard A. Johnson, Peter J. Senior, David Heath | 1999-11-30 |
| 5957848 | Preparation of further diagnostic agents | Richard A. Johnson | 1999-09-28 |
| 5955108 | Cross-linked microparticles and their use as therapeutic vehicles | Richard A. Johnson | 1999-09-21 |
| 5741478 | Preparation of hollow microcapsules by spray-drying an aqueous solution of a wall-forming material and a water-miscible solvent | Nicholas Osborne, Richard A. Johnson | 1998-04-21 |
| 5518709 | Preparation of diagnostic agents | Richard A. Johnson, Peter J. Senior, David Heath | 1996-05-21 |