Ronald E. Leone
24Patents
7h-index
18Co-inventors
66Inventor score
Filing activity: Jun 29, 1976 → Mar 13, 2000
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4030925A | Photographic compositions and elements including internal latent image silver halide grains and acylhydrazinophenylthiourea nucleating agents therefor | Chemistry; Metallurgy | 39 | Expired |
| US4031127A | Acyl hydrazino thiourea derivatives as photographic nucleating agents | Physics | 19 | Expired |
| US4080207A | Radiation-sensitive compositions and photographic elements containing N-(acylhydrazinophenyl) thioamide nucleating agents | Physics | 16 | Expired |
| US4276364A | Acylhydrazinophenylthiourea nucleating agents and photographic emulsions and elements containing such agents | Physics | 14 | Expired |
| US5856072A | Photographic element containing 5-carbamoyl resorcinol interlayer scavenger | Physics | 12 | Expired |
| US4576905A | Photographically useful chalcogenazoles, chalcogenazolines, and chalcogenazolinium and chalcogenazolium salts | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5104769A | High contrast photographic element and emulsion and process for their use | Physics | 10 | Expired |
| US5942381A | Photographic element and process employing active, stable benzotriazole-releasing DIR couplers | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5250399A | Photographic material and process comprising a universal coupler | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4874866A | Photographically useful chalcogenazoles, chalcogenazolines, and chalcogenazolinium and chalcogenazolium salts | Physics | 3 | Expired |
| US5561036A | Photographic elements containing scavengers for oxidized developing agent | Physics | 3 | Expired |
| US6107017A | Photographic elements containing high-boiling diester solvents | Physics | 2 | Expired |
| US4831136A | Oxatellurazolium and oxatellurazinium compounds | Physics | 2 | Expired |
| US5965341A | Photographic element containing particular coupler combination | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5821039A | Photographic element containing neutral dye-forming resorcinol coupler | Physics | 1 | Expired |
| US4948721A | Photographic recording materials with enhanced latent image stability | Physics | 1 | Expired |
| US5506094A | Photographic elements comprising 2-phenylcarbamoyl-1-naphthol image-modifying couplers yielding dyes resistant to crystallization and reduction | Emerging Cross-Sectional Technologies | 1 | Expired |
| US5561035A | Photographic elements containing scavengers for oxidized developing agent | Physics | 1 | Expired |
| US5514530A | Photographic elements comprising 2-phenylcarbamoyl-1-naphthol image-modifying couplers yielding dyes resistant to crystallization and reduction | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6054258A | Photographic elements containing high-boiling esters | Physics | 1 | Expired |
| US6255045A | Color photographic element containing improved polymeric disulfonamidophenol for scavenging oxidized developer | Physics | 1 | Expired |
| UST965005I4 | Nucleating agents, radiation-sensitive compositions and photographic elements | General | 1 | Expired |
| UST997004I4 | Acylhydrazinophenylthiourea nucleating agents and photographic emulsions and elements containing such agents | General | 0 | Expired |
| US5521057A | Photographic elements comprising 2-phenylcarbamoyl-1-naphthol image-modifying couplers yeilding dyes resistant to crystallization and reduction | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.