Light-sensitive supersensitized silver halide photographic material
Abstract
Abstract Light-sensitive silver halide photographic material characterized by containing in the silver halide photographic emulsion layer thereof a combination of sensitizing dyes comprising at least one compound represented by the general formula (I), wherein R1 and R2 are individually a lower alkyl group which may be in etherated form; R3 and R4 are individually a lower alkyl group, a hydroxyalkyl group or a sulfoalkyl group; Y1 and Y2 are individually a lower alkyl group which may be in etherated form, or an aryl group; X( ) is an anion (that is an acid anion); and n is an integer of 1 or 2, with at least one compound represented by the general formula (II), wherein R5 is a lower alkyl group; and A is an alkylene group, or a combination of said compounds with at least one compound represented by the general formula (III), wherein R6 is a lower alkyl group; R2 is a lower alkyl group, a hydroxyalkyl group, a carboxyalkyl group or a sulfoalkyl group; Y3 is a hydrogen atom, a lower alkyl group or a lower alkoxy group; Z is S or Se: X is a negative group; and n is an integer of 1 or 2.
Inventors
- 👤 S Saito
- 👤 K Sakazume
- 👤 S Sato
- 👤 E Sakamoto
- 👤 T Kaneko
Bibliographic Details
Claims Analysis
Total Claims: 9References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |