US3630745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
THIAZOLO {8 5,4-c{9 ISOQUINOLINE AND THIAZOLO {8 4,5-c{9 IOSQUINOLINE AND DERIVATIVES AS ANTIFOGGANTS FOR PHOTOGRAPHIC LAYERS
Assignee: Eastman Kodak Co
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Filing: 1969-10-08
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Granted: 1971-12-28
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Expires: 1989-10-08
Abstract
Abstract Thiazolo (5,4-c) isoquinoline and thiazolo (4,5-c) isoquinoline and their derivatives are used in silver halide elements and emulsions in order to stabilize said elements and emulsions against fog.
Inventors
- 👤 Dorothy J Beavers
- 👤 Norman W Kalenda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
A photographic element comprising a support, a silver halide layer and as a stabilizer a compound having the formula selected from the group consisting of
Claim 2
Dependent Claim
29 words
A photographic element as in claim 2 wherein said stabilizer is present in a concentration of from about 0.001 g. to about 10 g. per mole of silver halide.
Claim 3
Dependent Claim
14 words
A photographic silver halide emulsion comprising a stabilizing compound selected from the general formulas:
Claim 4
Dependent Claim
30 words
A photographic emulsion as in claim 4 wherein said stabilizing compound is present in a concentration of from about 30 mg. to about 0.5 g. per mole of silver halide.
Claim 5
Dependent Claim
14 words
A photographic emulsion as in claim 4 wherein said stabilizer is 2-aminothiazolo(5,4-c)isoquinoline or 2-aminothiazolo(4,5-c)isoquinoline.
Claim 6
Dependent Claim
14 words
A photographic emulsion as in claim 4 wherein said stabilizer is 2-chlorothiazolo(5,4-c)isoquinoline or 2-chlorothiazolo(4,5-c)isoquinoline.
Claim 7
Dependent Claim
14 words
A photographic emulsion as in claim 4 wherein said stabilizer is 2-hydroxythiazolo(5,4-c)isoquinoline or 2-hydroxythiazolo(4,5-c)isoquinoline.
Claim 8
Dependent Claim
15 words
A photographic emulsion as in claim 4 wherein said stabilizer is thiazolo(5,4-c)isoquinoline-2-thiol or thiazolo( 4,5-c)isoquinoline-2-thiol.
Claim 9
Dependent Claim
21 words
A photographic silver halide emulsion as in claim 4 wherein said silver halide emulsion is a high-speed gelatino silver bromoiodide emulsion.
Claim 10
Dependent Claim
26 words
A method for stabilizing photographic silver halide against fog which comprises contacting said silver halide with a stabilizing compound having a formula according to claim 1.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |