Silver halide photographic emulsion
Abstract
Abstract Disclosed is a silver halide photographic emulsion made highly sensitive to white light by use of a combination of at least one sensitizing dye represented by the general formula: <IMAGE> [I] wherein R1 represents a hydrogen atom, an alkyl group, or an aralkyl group, R2 represents a sulfoalkyl group, or a sulfoaralkyl group, and R3 represents an unsubstituted or substituted alkyl group, and at least one sensitizing dye represented by the general formula: <IMAGE> [II] wherein W1 to W4 represent each an alkyl group, an alkoxy group, or a hydroxyl group, or a pair of W1 and W2 or a pair of W3 and W4 forms an alkylenedioxy group, provided that said pair of W1 and W2 and said pair of W3 and W4 have each at least one alkoxy or hydroxyl group or said alkylenedioxy group; R4 represents a hydrogen atom, an alkyl group, an aralkyl group, or an aryl group; R5 represents a sulfoalkyl group or a sulfoaralkyl group; and R6 represents an unsubstituted or substituted alkyl group.
Inventors
- 👤 Akira Tanaka
- 👤 Hidetoshi Miura
Bibliographic Details
Claims Analysis
Total Claims: 7References Cited (Backward Citations)
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) | 1989-11-10 | 1990-05-12 | 1990-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-10 | 1994-05-12 | 1994-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-10 | 1998-05-12 | 1998-11-11 | $7700.00 | Window Closed / Lapsed |