Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7455959 | Photographic element containing a speed-enhancing compound | Bernard A. Clark, Tania Zuberi, Stephen P. Singer, Charles E. Heckler, Louis E. Friedrich | 2008-11-25 |
| 7354701 | Photographic element with speed-enhancing compound | Bernard A. Clark, Tania Zuberi, Stephen P. Singer, Charles E. Heckler, Louis E. Friedrich | 2008-04-08 |
| 7108964 | Compound containing an anthranilic acid blocking group | Stephen P. Singer, Trevor J. Wear, Louis E. Friedrich, Siu (Lambert) C. Tsoi, Bernard A. Clark +1 more | 2006-09-19 |
| 6887656 | Color photographic element containing improved heterocyclic speed enhancing compound | Louis E. Friedrich, Judith A. Bogie, Bernard A. Clark, Charles E. Heckler, Stephen P. Singer | 2005-05-03 |
| 6730465 | Color photographic element containing a heterocyclic dye-forming coupler | Paul L. Stanley | 2004-05-04 |
| 6589724 | Color photographic element containing speed-improving benzotriazole polymer | Stephen P. Singer, David S. Ross, Bernard A. Clark, David B. Bailey, Louis E. Friedrich | 2003-07-08 |
| 6455242 | Color photographic element containing speed improving compound | Bernard A. Clark, John D. Goddard, Louis E. Friedrich, James A. Friday, Stephen P. Singer +1 more | 2002-09-24 |
| 6319660 | Color photographic element containing speed improving compound | Bernard A. Clark, John D. Goddard, Louis E. Friedrich, James A. Friday, Stephen P. Singer +1 more | 2001-11-20 |
| 6316177 | Color photographic element containing speed-improving polymers | Tienteh Chen, David S. Ross, Stephen P. Singer | 2001-11-13 |
| 6309811 | Color photographic element containing nitrogen heterocycle derivative and inhibitor releasing coupler | Louis E. Friedrich, Stephen P. Singer | 2001-10-30 |
| 6238855 | Photographic element containing a DIR coupler | Christina M. Watts, Paul L. Stanley | 2001-05-29 |
| 6197488 | Color photographic element containing a coupler releasing derivative with at least three heteroatoms with specific hydrophobicity | Bernard A. Clark, Louis E. Friedrich, Stephen P. Singer | 2001-03-06 |
| 6171771 | Photographic element containing a DIR coupler | Paul B. Merkel, David A. Steele, Jerrold N. Poslusny | 2001-01-09 |
| 6146820 | Photographic element containing a DIR coupler | Paul B. Merkel, David A. Steele, Jerrold N. Poslusny | 2000-11-14 |
| 6140029 | Color photographic element containing elemental silver and nitrogen heterocycle in a non-light sensitive layer | Bernard A. Clark, Jane S. Boff, Louis E. Friedrich, Stephen P. Singer | 2000-10-31 |
| 5928851 | Photographic couplers which release useful groups anchiomerically and their synthesis | — | 1999-07-27 |
| 5491049 | Photographic colour couplers, methods of making them and photographic materials containing them | — | 1996-02-13 |
| 5460925 | Photographic color couplers and photographic materials containing them | — | 1995-10-24 |