Desensitizers in unfogged silver halide systems
Abstract
Abstract THIS INVENTION RELATES TO IMPROVED SILVER HALIDE SYSTEMS WHICH CONTAIN UNFOGGED SILVER HALIDE GRAINS HAVING METAL DOPANTS OCCLUDED THEREIN AND AT LEAST ONE COMPOUND HAVING A CATHRODIC HALFWAVE POTENTIAL MORE POSITIVE THAN-1.0 WHICH IS A DESENSITIZER FOR SURFACE-SENSITIZED SILVER HALIDE EMULSIONS. IN ONE ASPECT, THIS INVENTION RELATES TO A PROCESS FOR FORMING NEGATIVE PHOTOGRAPHIC IMAGES COMPRISING (1) IMAGEWISE-EXPOSING A SILVER HALIDE EMULSION WHICH COMPRISES SILVER HALIDE GRAINS CONTAINING METAL DOPANTS OCCLUDED THEREIN AND WHEREIN SAID GRAINS HAVE ADSORBED TO THE SURFACE THEREOF A DESENSITIZER OR AN ELECTRON-ACCEPTOR COMPOUND AND (2) DEVELOPING SAID EXPOSED EMULSION IN AN INTERNAL-IMAGE SILVER HALIDE DEVELOPER. BLACK-AND-WHITE AND COLOR DIFFUSION TRANSFER PHOTOGRAPHIC ELMENTS EMPLOYING THE NOVEL SILVER HALIDE EMULSIONS ARE ALSO DESCRIBED.
Inventors
- 👤 John Spence
- 👤 Paul Brewster Gilman Jr
- 👤 Cynthia Geer Ulbing
Bibliographic Details
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |