John W. Harder
38Patents
8h-index
57Co-inventors
78Inventor score
Filing activity: Apr 24, 1986 → Mar 8, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4684604A | Oxidative release of photographically useful groups from hydrazide compounds | Emerging Cross-Sectional Technologies | 54 | Expired |
| US6132947A | Cyan coupler, and stabilizer-containing photographic element and process | Physics | 41 | Expired |
| US5411839A | Image formation in color reversal materials using strong inhibitors | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4923787A | Photographic element containing scavenger for oxidized developing agent | Chemistry; Metallurgy | 22 | Expired |
| US5151343A | Photographic material and process comprising wash-out naphtholic coupler | Physics | 22 | Expired |
| US5925503A | Photographic element having improved magenta dye light stability and process for its use | Physics | 11 | Expired |
| US5629140A | Photographic elements containing scavengers for oxidized developing agent | Physics | 9 | Expired |
| US7541017B2 | Amine polymer-modified nanoparticulate carriers | Emerging Cross-Sectional Technologies | 9 | Active |
| US8841134B2 | Fluorescence resonance energy transfer detection with nanoparticles for in vitro and in vivo applications | Physics | 8 | Active |
| US5413905A | Photographic sensitivity increasing alkynylamine compounds and photographic elements | Physics | 8 | Expired |
| US6190851A | Photographic element, dispersion, compound and process | Physics | 7 | Expired |
| US5380633A | Image information in color reversal materials using weak and strong inhibitors | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4990430A | Process for retouching dye images | Physics | 5 | Expired |
| US7629112B1 | Color photographic materials with yellow minimum density colorants | Physics | 5 | Active |
| US5021325A | Photographic material and process comprising a pyrazolotriazole coupler | Physics | 4 | Expired |
| US5051343A | Photographic elements containing removable couplers | Physics | 4 | Expired |
| US4923784A | Photographic elements containing a bleach accelerator precursor | Physics | 4 | Expired |
| US5283340A | Photographic material and process comprising wash-out naphtholic coupler | Physics | 3 | Expired |
| US6037113A | Photographic element and process for its use | Emerging Cross-Sectional Technologies | 3 | Expired |
| US4865956A | Photographic elements containing a bleach accelerator precursor | Physics | 3 | Expired |
| US5118594A | Photographic elements containing removable couplers | Physics | 2 | Expired |
| US5158865A | Photographic elements containing removable filter dye | Physics | 2 | Expired |
| US6190852A | Photographic element containing nitrogen heterocycle substituted cyan coupler and process | Physics | 2 | Expired |
| US7632632B1 | Color photographic materials with magenta minimum density dyes | Physics | 1 | Active |
| US6096493A | Magenta and yellow coupler combination in silver halide photographic element | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.