Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879209 | Photographic proteinaceous layers comprising dextran derivatives | Joan Vermeersch, Daniel M. Timmerman, Jacques L. Vervecken | 1989-11-07 |
| 4820613 | Photographic surface layers comprising dextran derivatives | Joan Vermeersch, Jacques L. Vervecken, Daniel M. Timmerman | 1989-04-11 |
| 4820615 | Photographic silver halide element having a protective layer comprising beads of resinous material and water-insoluble wax | Jacques L. Vervecken | 1989-04-11 |