Silver-dye-bleach photographic materials
Abstract
Abstract SILVER-DYE-BLEACH PHOTOGRAPHIC ELEMENTS ARE PREPARED BY INCOPORAATNG THE IMAGE-FORMING DYES IN A FOGGED INTERNAL IMAGE SILVER HALIDE EMULSION AND COATING OVER THIS EMULSION A LAYER OF UNFOGGED SURFACE-SENSITIVE SILVER IODOHALIDE EMULSION. THE DYE LAYER IS THUS SEPARATED FROM THE SENSITIVE LAYER WITH CONSEQUENT IMPROVEMENT IN SPEED AND CONTRAST. UPON DEVELOPMENT OF THE EXPOSED ELEMENT, IODIDE ION RELEASED FROM THE SILVER IODOHALIDE EMULSION MIGRATES TO THE ADJACENT FOGGED INTERNAL IMAGE EMULSION AND UNCOVERS THE INTERNAL FOG CENTERS, THUS PERMITTING THEIR DEVELOPMENT. THEN, UPON SILVER-DYE-BLEACH PROCESSING A POSITIVE DYE IMAGE IS OBTAINED WHICH HAS AMPLE DENSITY AND CONTRAST.
Inventors
- 👤 G Luckey
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |