Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4577024 | Oxoindolizine and oxoindolizinium compounds useful as dyes | Steven Bender, Donald H. Wadsworth | 1986-03-18 |
| 4450093 | Indolizinone dyes and compositions, elements and methods using same | Donald H. Wadsworth | 1984-05-22 |
| 4446223 | Recording and information record elements comprising oxoindolizine and oxoindolizinium dyes | Donald H. Wadsworth, Harold T. Thomas, Charles H. Weidner | 1984-05-01 |
| 4373021 | Indolizinone dyes and compositions, elements and methods using same | Donald H. Wadsworth | 1983-02-08 |
| 4368247 | Photographic materials and processes comprising oxoindolizine and oxoindolizinium compounds | Steven Bender, Donald H. Wadsworth | 1983-01-11 |
| 4283477 | Photothermographic material and process | Richard A. Demauriac, Stewart H. Merrill | 1981-08-11 |
| 4247625 | Imaging processes, elements and compositions featuring dye-retaining binders for reaction products of cobalt complexes and aromatic dialdehyde | Wojciech M. Przezdziecki, John C. Wilson, Paul D. Yacobucci, Richard C. Van Hanehem | 1981-01-27 |