US3617293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic supersensitized silver halide emulsions
Assignee: Fujifilm Holdings Corp
•
Filing: 1968-07-26
•
Granted: 1971-11-02
•
Expires: 1988-07-26
Abstract
Abstract A photographic silver halide emulsion containing at least one carbocyanine dye represented by the following general formula (I): and at least one carbocyanine dye represented by the general formula (II): The representative moieties set out above are specifically defined in the specification.
Inventors
- 👤 Keisuke Shiba
- 👤 Akira Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
28 words
A photographic silver halide emulsion as claimed in claim 1 wherein the carbocyanine dye represented by general formula (I) is a compound selected from the group consisting of:
Claim 2
Dependent Claim
28 words
A photographic silver halide emulsion as claimed in claim 1, wherein the carbocyanine dye represented by general formula (II) is a compound selected from the group consisting of:
Claim 3
Dependent Claim
72 words
A photographic silver halide emulsion as defined in claim 1 wherein R1, R2, R3 and R4 are selected from the group consisting of a methyl group, an ethyl group, a propyl group, a 2-hydroxyethyl group, a 2-methoxyethyl group, a carboxymethyl group, a 2-carboxyethyl group, a 3-carboxypropyl group, a 4-carboxybutyl group, a 2-sulfoethyl group, a 3-sulfopropyl group, a 4-sulfobutyl group, a 3-sulfoisobutyl group, a 2-carboethoxyethyl group, an aralkyl group and a vinylmethyl group.
Claim 4
Dependent Claim
37 words
A photographic silver halide emulsion as in claim 1 wherein X1 and X2 are selected from the group consisting of chlorine ions, bromine ions, iodine ions, perchloric acid ions, p-toluene sulfonic acid ions and ethyl sulfate ions.
Claim 5
Dependent Claim
54 words
A photographic silver halide emulsion as claimed in claim 1 wherein in said combination there is no substantial shifting of the maximum sensitizing wavelength to a longer wavelength, and said sensitizing dye of formula (II) has a spectral sensitivity over substantially the whole red-sensitive region at 590 m Mu to 680 m Mu .
References Cited (Backward Citations)
US2533427A
Cited
US3432303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |