US4069052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic materials with spiro heterocyclic stabilizing agents comprising 2-imidazolidine-4',5'-dione rings
Assignee: Agfa Gevaert AG
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Filing: 1975-12-15
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Granted: 1978-01-17
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Expires: 1995-12-15
Abstract
Abstract A photographic silver halide material containing a new stabilizer compound which is an aromatic compound containing in ortho position two bridging members which are linked to form a spiro structure with a 2'-imidazolidine-4',5'-dione as defined hereinafter.
Inventors
- 👤 Karl Lohmer
- 👤 Anita VON Konig
- 👤 Siegismund Schutz
- 👤 Jurgen Stoltefuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:52
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/10; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
In a photographic material containing at least one silver halide emulsion layer and a support and a stabilizer compound the improvement according to which the stabilizer compound is a phenyl compound in which the phenyl ring is ortho disubstituted with oxygen, sulfur or --NH-- as bridging members being linked together to form a spiro structure with 2'-imidazolidine-4',5'-dione.
Claim 2
Dependent Claim
57 words
In a photographic material containing at least one silver halide emulsion layer and a support and a stabilizer compound the improvement according to which the stabilizer compound is a phenyl compound in which the phenyl ring is ortho disubstituted with oxygen, sulfur or --NH-- as bridging members being linked together to form a spiro structure with 2'-imidazolidine-4',5'-dione.
Claim 3
Dependent Claim
87 words
Photographic material according to claim 1 in which the stabilizer compound is a compound of the following structural formula ##STR8## in which R and R' which may be the same or different, represent hydrogen, alkyl with 1 to 10 carbon atoms, phenyl, phenylalkyl, the alkyl group having up to 4 carbon atoms, cycloalkyl or halogen or R and R' may together represent the carbon atoms required to close a condensed cyclohexene, cyclohexadiene or benzene ring, X represents oxygen or -NH- and Y represents oxygen, sulfur or --NH--.
Claim 4
Dependent Claim
13 words
Photographic material as claimed in claim 1 in which the support is hydrophobic.
Claim 5
Dependent Claim
21 words
Photographic material as claimed in claim 3 in which the support is an electron irradiation or corona discharge treated hydrophobic support.
Claim 6
Dependent Claim
107 words
In a process for the production of color photographic materials by treatment of the surface of a hydrophobic support with an electron beam or corona discharge to improve the adhesion of the support to hydrophilic colloid layers, at least one silver halide emulsion layer being applied onto the support, which layers are applied onto the support after said electron beam or corona discharge treatment, the improvement according to which at least one of said layers is provided with a phenyl compound in which the phenyl ring is ortho disubstituted with oxygen, sulfur or --NH-- as bridging members being linked together to form a spiro structure with 2'-imidazolidine-4',5'-dione.
Claim 7
Dependent Claim
107 words
In a process for the production of color photographic materials by treatment of the surface of a hydrophobic support with an electron beam or corona discharge to improve the adhesion of the support to hydrophilic colloid layers, at least one silver halide emulsion layer being applied onto the support, which layers are applied onto the support after said electron beam or corona discharge treatment, the improvement according to which at least one of said layers is provided with a phenyl compound in which the phenyl ring is ortho disubstituted with oxygen, sulfur or --NH-- as bridging members being linked together to form a spiro structure with 2'-imidazolidine-4',5'-dione.
Claim 8
Dependent Claim
32 words
The process of claim 5 in which the silver halide emulsion layer is applied to the treated support within a period of from one second to several hours after the surface treatment.
Claim 9
Dependent Claim
58 words
In the process for the production of color photographic materials by electron beam or corona discharge treatment of the surface of a hydrophobic support as claimed in claim 5 after said treatment of said surface first applying an intermediate layer between the support and the silver halide emulsion layer, said phenyl compound being included in said intermediate layer.
References Cited (Backward Citations)
US3137578A
Cited
US3582333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |