Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6139946 | Magnetic recording media incorporating a quaternary ammonium functional binder and magnetic pigment surface treated with compound having acidic and electron withdrawing functionalities | John S. Roden | 2000-10-31 |
| 4728598 | Photographic color couplers, photographic materials containing them and method of forming dye images | David N. Rogers | 1988-03-01 |
| 4482626 | Photographic color developer compositions | Peter Jeffrey Twist, Stuart Briggs, Miroslav V. Mijovic, David T. Southby | 1984-11-13 |
| 4481268 | Method of forming a photographic dye image | David Clarke, Michael W. Crawley, Peter D. Marsden, Jasbir Sidhu | 1984-11-06 |
| 4426326 | Nondiffusible metal-complexed azo dye-releasing compounds | David Clarke, Linda G. Johnston | 1984-01-17 |
| 4358527 | Photographic products employing nondiffusible metal-complexed azo dye-releasing compounds and precursors thereof | David Clarke, Linda G. Johnston | 1982-11-09 |
| 4338393 | Heterocyclic magenta dye-forming couplers | John Cook | 1982-07-06 |
| 4272434 | Nondiffusible compounds having a releasable azo dye moiety | Brian D. Baigrie, Linda G. Johnston, Miroslav V. Mijovic | 1981-06-09 |
| 4250238 | Photographic products and processes employing novel dye developer compounds | Brian D. Baigrie, Linda G. Johnston, Miroslav V. Mijovic | 1981-02-10 |
| 4248956 | Photographic products and processes employing heterocyclic azo dye developer compounds | Brian D. Baigrie, Linda G. Johnston, Miroslav V. Mijovic | 1981-02-03 |
| 4183753 | Photographic products and processes employing metal complexed azo dyes | Brian D. Baigrie, Linda G. Johnston, Miroslav V. Mijovic | 1980-01-15 |