Norman G. Rule
15Patents
8h-index
9Co-inventors
61Inventor score
Filing activity: May 2, 1974 → Mar 26, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4968813A | Derivatives of 4H-thiopyran-1,1-dioxides | Physics | 58 | Expired |
| US4127412A | Photoconductive compositions and elements | Physics | 27 | Expired |
| US4025341A | Photoconductive polymer and photoconductive compositions and elements containing same | Physics | 23 | Expired |
| US5213927A | Inverse multiactive electrophotographic element | Physics | 15 | Expired |
| US4301226A | Crystallization inhibiting mixtures of arylmethane photoconductors | Physics | 12 | Expired |
| US5039585A | Electrophotographic elements containing new electron-transport agents | Physics | 10 | Expired |
| US5034293A | Electrophotographic elements containing 4H-thiopyran-1,1-dioxide derivatives as electron-transport agents | Chemistry; Metallurgy | 9 | Expired |
| US5013849A | Derivatives of 4H-thiopyran-1,1-dioxides useful as electron-transport agents in electrophotographic elements | Physics | 9 | Expired |
| US3973962A | Aggregate photoconductive composition containing combination of pyrylium dye salts | Physics | 8 | Expired |
| US5232801A | Hole-transport liquid crystalline polymeric compounds, electrophotographic elements comprising same, and electrophotographic process | Physics | 8 | Expired |
| US5028504A | Infrared-sensitive photoconductor elements incorporating a cyanine dye and a perylene pigment | Physics | 6 | Expired |
| US5232802A | Electron-transport liquid crystalline polymeric compounds, electrophotographic elements comprising same, and electrophotographic process | Physics | 4 | Expired |
| US3966468A | Organic photoconductors with triamino benzene additives | Physics | 3 | Expired |
| US4423203A | Electrically photosensitive polymers containing vinylene-1,4-phenylene-imino-1,4-phenylene-vinylenearylene groups | Physics | 3 | Expired |
| US4788336A | Novel organic compounds for use in electrophotographic elements | Physics | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.