US3873323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally sensitized silver halide photographic emulsions
Assignee: Fujifilm Holdings Corp
•
Filing: 1973-05-31
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Granted: 1975-03-25
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Expires: 1993-05-31
Abstract
Abstract A silver halide photographic emulsion containing at least one sensitizing dye represented by the general formula: HAS HIGH SPECTRAL SENSITIVITY IN THE VICINITY OF 460 - 490 M Mu . Moieties R1 - R4 are defined in the specification.
Inventors
- 👤 Yasuharu Nakamura
- 👤 Yoshiyuki Nakazawa
- 👤 Tohru Sueyoshi
- 👤 Akira Sato
- 👤 Tadashi Ideda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION CHARACTERIZED BY CONTAINING AT LEAST ONE SENSTIZING DYE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
19 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION CHARACTERIZED BY CONTAINING AT LEAST ONE SENSTIZING DYE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
Claim 3
Dependent Claim
17 words
A silver halide photographic emulsion as claimed in claim 1 wherein R1 and R2 are unsubstituted alkyl.
Claim 4
Dependent Claim
38 words
A silver halide photographic emulsion as claimed in claim 1, wherein any alkyl moiety has up to 4 carbon atoms, with the exception of the alkyl moiety in the alkoxy group which has up to 3 carbon atoms.
Claim 5
Dependent Claim
28 words
A silver halide photographic emulsion as claimed in claim 3 wherein said acyl group is an aromatic acyl or aliphatic acyl group having up to 3 carbon atoms.
Claim 6
Dependent Claim
17 words
A silver ahalide photographic emulsion as claimed in claim 4 wherein said aromatic acyl group is benzoyl.
Claim 7
Dependent Claim
28 words
A silver halide photographic emulsion as claimed in claim 4 wherein said silver halide has an average particle diameter, in number, of less than about 0.1 Mu .
Claim 8
Dependent Claim
35 words
A silver halide photographic emulsion as claimed in claim 1 wherein said sensitizing dye is present in an amount of from about 1 X 10 3 to about 1 X 10 4 mol/mol of silver.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |