Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6746807 | Thermally bleachable filter dye compositions comprising benzothiazine-dioxide arylidene dyes and base precursors for use in a photothermographic element | Margaret J. Helber, Teresa Joy Hosmer, David H. Levy | 2004-06-08 |
| 6730462 | Thermally bleachable yellow filter dye compositions barbituric acid arylidene dyes and base precursors | Margaret J. Helber, Cynthia A. MacMillan, Mary Christine Brick | 2004-05-04 |
| 6699651 | Base precursors for use in a photothermographic element | David H. Levy | 2004-03-02 |