Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871654 | Photographic element incorporating redox compounds for use in a dye diffusion transfer process | Christian C. Van de Sande | 1989-10-03 |
| 4855223 | Organic compounds for use in a dye diffusion transfer process and photographic elements incorporating them | Janssens Wilhelmus, Christian C. Van de Sande | 1989-08-08 |
| 4820608 | Dye diffusion transfer imaging process and image receptor used therein | Daniel A. Claeys, Daniel M. Timmerman, Antonius A. Rutges, Eddy Michiels, Piet Kok | 1989-04-11 |
| 4814255 | Mordanting polymers for acid dyes | Wilhelmus Janssens | 1989-03-21 |