Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749641 | Imaging element containing dye masking coupler | John E. Kaufman | 1988-06-07 |
| 4596876 | Phthalaldehyde adducts | Thap DoMinh | 1986-06-24 |
| 4499304 | Color-forming sulfonamidodiphenylamines and corresponding sulfonimide dyes | Rolf S. Gabrielsen, Patricia A. Graham, James E. Klijanowicz | 1985-02-12 |
| 4410623 | Phthalaldehyde adduct and imaging compositions, elements and methods incorporating same | Thap DoMinh | 1983-10-18 |
| 4390606 | Color-forming para-sulfonamidodiphenylamine dye precursor and sulfonimide dye in photographic material and process | Rolf S. Gabrielsen, Patricia A. Graham, James E. Klijanowicz | 1983-06-28 |