Stephen P. Singer
82Patents
11h-index
81Co-inventors
81Inventor score
Filing activity: May 13, 1985 → Sep 27, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4840884A | Photographic element and process comprising a dye releasing group | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5019492A | Photographic element and process comprising a blocked photographically useful compound | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5563026A | Color negative element having improved green record printer compatibility | Physics | 28 | Expired |
| US6319660A | Color photographic element containing speed improving compound | Physics | 28 | Expired |
| US5641613A | Photographic element containing an azopyrazolone masking coupler exhibiting improved keeping | Physics | 19 | Expired |
| US5250405A | Color photographic materials including magenta coupler, inhibitor-releasing coupler and carbonamide compound, and methods | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4619884A | Photographic products employing nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds capable of releasing photographically useful groups | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5376519A | Photographic material containing a coupler composition comprising magenta coupler, phenolic solvent, and at least one aniline or amine | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5856072A | Photographic element containing 5-carbamoyl resorcinol interlayer scavenger | Physics | 12 | Expired |
| US5200309A | Color photographic materials including magenta coupler, carbonamide compound and aniline or amine compound, and methods | Physics | 12 | Expired |
| US5389504A | Color photographic elements containing a combination of pyrazolone and pyrazoloazole couplers | Physics | 12 | Expired |
| US5298368A | Photographic coupler compositions and methods for reducing continued coupling | Physics | 11 | Expired |
| US4912024A | Photographic material having releasable compound | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5262292A | Photographic elements containing pyrazolone couplers and process | Physics | 10 | Expired |
| US6350564B1 | Color photographic element containing speed improving compound in combination with reflecting material | Physics | 9 | Expired |
| US5447831A | Photographic element employing hue correction couplers | Physics | 9 | Expired |
| US6426180B1 | Color photographic element containing speed improving compound in combination with electron transfer agent releasing compound | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5256528A | Magenta image-dye couplers of improved hue | Physics | 9 | Expired |
| US5629140A | Photographic elements containing scavengers for oxidized developing agent | Physics | 9 | Expired |
| US5262284A | Arylidene pyrazolone coupler | Physics | 9 | Expired |
| US5350667A | Photographic elements containing magenta couplers and process for using same | Physics | 9 | Expired |
| US5681691A | Photographic element containing an improved pyrazolotriazole coupler | Physics | 7 | Expired |
| US6054257A | Photographic element containing particular coupler and inhibitor releasing coupler | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6190848A | Color photographic element containing ballasted triazole derivative and inhibitor releasing coupler | Emerging Cross-Sectional Technologies | 7 | Expired |
| US6455242B1 | Color photographic element containing speed improving compound | Physics | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.