John Lenoir
17Patents
5h-index
12Co-inventors
59Inventor score
Filing activity: Oct 23, 1973 → Dec 8, 1986
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4118232A | Photographic material containing sulphonic acid group containing disazo dyestuffs | Physics | 25 | Expired |
| US4051123A | Sulfonic-acid-group containing disazo dyestuffs | Physics | 18 | Expired |
| US4254215A | Process for the prevention of darkening and the formation of a sediment in photographic developer solutions | Physics | 17 | Expired |
| US4141734A | Photographic developing process | Physics | 16 | Expired |
| US4747637A | Externally retractable sunroof | Performing Operations; Transporting | 5 | Expired |
| US3961957A | Dye bleach preparation for the photographic silver dye bleach process | Physics | 5 | Expired |
| US4379819A | Color-photographic recording material for the silver dye bleach process | Physics | 4 | Expired |
| US4521591A | Oil-soluble disazo dyes and their use in color-photographic recording materials for the silver dye bleach process | Physics | 3 | Expired |
| US4202698A | Quinoxalines and their use in photographic processes | Physics | 2 | Expired |
| US3957860A | Process for the manufacture of nuclear-sulphonated compounds | Chemistry; Metallurgy | 2 | Expired |
| US4145217A | Quinoxalines and their use in photographic processes | Physics | 2 | Expired |
| US3931142A | Heterocyclic containing disazo compounds | Chemistry; Metallurgy | 2 | Expired |
| US4323682A | Quinoxalines and their use in photographic processes | Physics | 2 | Expired |
| US4456668A | Azo dyes containing phosphamic acid diester groups | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4575482A | Photographic silver dye bleach materials containing formyl-substituted azo compounds as image dyes | Chemistry; Metallurgy | 1 | Expired |
| US4409143A | Monoazo dyes containing phosphamic acid diester groups | Emerging Cross-Sectional Technologies | 0 | Expired |
| US4216320A | Quinoxaline bleach catalysts | Physics | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.