US3622340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-thiouracil compounds as fog inhibitors
Assignee: Eastman Kodak Co
•
Filing: 1968-08-12
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Granted: 1971-11-23
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Expires: 1988-08-12
Abstract
Abstract 4-Thiouracil compounds, including novel 4-thiouracil compounds, are prepared by reacting ammonia or primary amine with novel adducts of an alkoxycarbonyl isothiocyanate and a tertiary enamine. The 4-thiouracil compounds are useful photographic fog inhibitors.
Inventors
- 👤 Robert W Lamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:44
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/14; C07D295/145; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/56; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
14 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is hydrogen.
Claim 2
Dependent Claim
16 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is an alkyl group.
Claim 3
Dependent Claim
16 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is a hydroxyalkyl group.
Claim 4
Dependent Claim
16 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is a dialkylaminoalkyl group.
Claim 5
Dependent Claim
17 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is phenyl or substituted phenyl.
Claim 6
Dependent Claim
14 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rf is phenyl.
Claim 7
Dependent Claim
12 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein .
Claim 8
Dependent Claim
17 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rc and Rd collectively represent trimethylene.
Claim 9
Dependent Claim
17 words
A light-sensitive silver halide emulsion in accordance with claim 1 wherein Rc and Rd collectively represent tetramethylene.
Claim 10
Dependent Claim
16 words
A light-sensitive silver halide emulsion in accordance with claim 1 containing as an antifoggant 6,7-dihydro-1-carbethoxymethyl-2(1H)-oxo-5H-cyclopentapyrimidine-4-(3H) -thione.
Claim 11
Dependent Claim
15 words
A light-sensitive silver halide emulsion in accordance with claim 1 containing as an antifoggant 5,6,7,8-tetrahydro-2(1H)-oxo-1-phenylquinazoline-4-(3H)-thione.
Claim 12
Dependent Claim
15 words
A light-sensitive silver halide emulsion in accordance with claim 1 containing as an antifoggant 5-ethyl-1-phenyl-4-thiouracil.
Claim 13
Dependent Claim
15 words
A light-sensitive silver halide emulsion in accordance with claim 1 containing as an antifoggant 5-ethyl-4-thiouracil.
Claim 14
Dependent Claim
15 words
A light-sensitive silver halide emulsion in accordance with claim 1 containing as an antifoggant 5-carbethoxy-1-(2-hydroxyethyl)-6-methyl-4-thiouracil.
Claim 15
Dependent Claim
17 words
A photographic element comprising a support having thereon a layer containing a light-sensitive emulsion of claim 1.
Claim 16
Dependent Claim
17 words
A photographic element comprising a support having thereon a layer containing a light-sensitive emulsion of claim 9.
Claim 17
Dependent Claim
17 words
A photographic element comprising a support having thereon a layer containing a light-sensitive emulsion of claim 10.
References Cited (Backward Citations)
GB484595A
Cited
US2231127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |