US3615637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally sensitized photographic silver halide emulsions
Assignee: Fujifilm Holdings Corp
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Filing: 1969-12-04
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Granted: 1971-10-26
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Expires: 1989-12-04
Abstract
Abstract AND A CONDENSATE OF FORMALDEHYDE AND A POLYHYDROXYBENZENE, WHICH MAY BE SUBSTITUTED OR UNSUBSTITUTED. The emulsion is supersensitized. The sensitizing dye must contain at least one quinoline nucleus. A supersensitized photographic silver halide emulsion containing a sensitizing dye represented by the following general formula:
Inventors
- 👤 Keisuke Shiba
- 👤 Masanao Hinata
- 👤 Nobuo Tsuji
- 👤 Masao Sawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/20; C08G8/22; C08G8/28; C08G8/30; G03C1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
The photographic silver halide emulsion claimed in claim 1, wherein said sensitizing dye contains at least one quinoline nucleus, which may also have substituted thereon groups selected from the class consisting of halogen atoms, an alkyl group having one to eight carbon atoms, and alkoxyl group and a hydroxyl group, and said formalin condensate has 2-10 units as a degree of polymerization and a molecular weight of 300-800.
Claim 2
Dependent Claim
33 words
The photographic silver halide emulsion claimed in claim 1, wherein the concentration of said sensitizing dye is 0.002-0.2 g/mol. silver halide, and the concentration of said formalin condensate is 0.1-5.0 g/mol. silver halide.
Claim 3
Dependent Claim
26 words
The photographic silver halide emulsion claimed in claim 1, wherein the concentration ratio of said sensitizing dye to said formalin concentrate is from 1:5 to 1:500.
Claim 4
Dependent Claim
20 words
The photographic silver halide emulsion claimed in claim 1 wherein said silver halide emulsion is a gelatino silver halide emulsion.
Claim 5
Dependent Claim
30 words
The photographic silver halide emulsion claimed in claim 1, wherein said silver halide is from the group consisting of silver chloride, silver bromide, silver bromochloride, silver bromoiodide and silver bromochloroiodide.
Claim 6
Dependent Claim
28 words
A photographic silver halide element comprising a support and a photographic silver halide emulsion layer thereon containing at least one sensitizing dye represented by the following general formula:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |