Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695921 | Photographic elements with magenta dye forming couplers and stabilizers | Paul P. Spara, Rakesh K. Jain | 1997-12-09 |
| 5677118 | Photographic element containing a recrystallizable 5-pyrazolone photographic coupler | Paul P. Spara, Stanley W. Cowan, Ruthann M. McGarry | 1997-10-14 |
| 5627017 | Low melting point ionizable epoxy scavengers for residual magenta couplers | Krishnan Chari, Paul P. Spara | 1997-05-06 |
| 5605787 | 3-anilino pyrazolone magenta couplers and process | John L. Pawlak, David S. Bailey, William R. Schleigh, Charles E. Romano, Jr., Paul B. Merkel | 1997-02-25 |