Derek D. Chapman
106Patents
16h-index
35Co-inventors
86Inventor score
Filing activity: Nov 4, 1974 → Aug 19, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4952552A | Infrared absorbing quinoid dyes for dye-donor element used in laser-induced thermal dye transfer | Emerging Cross-Sectional Technologies | 64 | Expired |
| US4912083A | Infrared absorbing ferrous complexes for dye-donor element used in laser-induced thermal dye transfer | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5023229A | Mixture of dyes for magenta dye donor for thermal color proofing | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5036040A | Infrared absorbing nickel-dithiolene dye complexes for dye-donor element used in laser-induced thermal dye transfer | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5024990A | Mixture of dyes for cyan dye donor for thermal color proofing | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4757046A | Merocyanine dye-donor element used in thermal dye transfer | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5053381A | Dual laminate process for thermal color proofing | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5972838A | Infrared-absorbing cyanine colorants for laser-colorant transfer | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5401618A | Infrared-absorbing cyanine dyes for laser ablative imaging | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4734349A | Toners and yellow dye compounds used therein | Chemistry; Metallurgy | 21 | Expired |
| US4876237A | Thermally-transferable fluorescent 7-aminocoumarins | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4204870A | Photographic products and processes employing novel nondiffusible heterocyclyazonaphthol dye-releasing compounds | Physics | 19 | Expired |
| US5144015A | Synthesis of pyrazole dyes | Chemistry; Metallurgy | 18 | Expired |
| US4753922A | Neutral-black dye-donor element for thermal dye transfer | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5006503A | Thermally-transferable fluorescent europium complexes | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5426015A | Metallized azo dianion with two cationic dye counter ions for optical information recording medium | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4871714A | Thermally-transferable fluorescent diphenyl ethylenes | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4207104A | Photographic products and processes employing novel nondiffusible heterocyclylazonaphthol dye-releasing compounds | Physics | 16 | Expired |
| US5500325A | Dye mixtures for optical recording layers | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4287292A | Photographic products and processes employing novel nondiffusible 6-arylazo-3-pyridinol magenta dye-releasing compounds and precursors thereof | Physics | 16 | Expired |
| US5011816A | Receiver for thermally-transferable fluorescent europium complexes | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4892584A | Water soluble infrared absorbing dyes and ink-jet inks containing them | Chemistry; Metallurgy | 16 | Expired |
| US5272047A | Optical information recording medium using azo dyes | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4885272A | Thiadiazolyl-azo-pyrazole yellow dye-donor element for thermal dye transfer | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5177052A | Mixture of dyes for cyan dye donor for thermal color proofing | Emerging Cross-Sectional Technologies | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.