Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696586 | Bis AU(I) sensitizers and their synthesis | Brian P. Cleary, Roger Lok | 2004-02-24 |
| 6686143 | Silver halide photographic elements containing bis Au(I) sensitizers | Roger Lok, Brian P. Cleary, Alton L. Chitty | 2004-02-03 |
| 6365746 | Stable and water soluble bis Au(I) complexes and their synthesis | Roger Lok, Brian P. Cleary | 2002-04-02 |
| 6306283 | Method for screening chemical sensitizers | E. Steven Brandt, Brian P. Cleary, Roger Lok | 2001-10-23 |
| 6290749 | Preparation of ultra-pure silver metal | Gary G. Kiehl, Brian P. Cleary | 2001-09-18 |
| 6290747 | Conversion of impure silver halide to ultra-pure silver metal | Gary G. Kiehl, Brian P. Cleary | 2001-09-18 |
| 6033842 | Preparation of silver chloride emulsions having iodide containing grains | Roger Lok, Benjamin Teh-Kung Chen | 2000-03-07 |
| 6034249 | Stable and water soluble bis Au(I) complexes and their synthesis | Roger Lok, Brian P. Cleary | 2000-03-07 |
| 5945270 | Photographic element containing water soluble bis Au(I) complexes | Roger Lok, Brian P. Cleary | 1999-08-31 |
| 5939245 | Au(I) sensitizers for silver halide emulsions | Roger Lok, Melanie W. Marshall | 1999-08-17 |
| 5912112 | Au(I) sensitizers for silver halide emulsions | Roger Lok, Melanie W. Marshall | 1999-06-15 |
| 5912111 | Gold(I) sensitizers for silver halide emulsions | Roger Lok, Melanie W. Marshall | 1999-06-15 |
| 5700631 | Photographic element containing new gold(I) compounds | Roger Lok | 1997-12-23 |
| 5686236 | Photographic element containing new gold (I) compounds | Roger Lok | 1997-11-11 |
| 5620841 | Photographic element containing new gold(I) compounds | Roger Lok | 1997-04-15 |
| 5314670 | Recovery of rhodium values | Gary G. Kiehl | 1994-05-24 |
| 5000928 | Preparation of ultra-pure silver nitrate | — | 1991-03-19 |
| 4265862 | Process for purifying rare-earth compositions using fractional sulfate precipitation | Laurie A. Kimble | 1981-05-05 |