US4366231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic material containing a stabilizer, a process for its production, a development process, new pyrazoles, a process for their production and intermediate products
Assignee: Agfa Gevaert AG
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Filing: 1981-01-09
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Granted: 1982-12-28
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Expires: 2001-01-09
Abstract
Abstract Pyrazoles of the formula ##STR1## are useful as stabilisers in photographic materials.
Inventors
- 👤 Karl H. Mayer, deceased
- 👤 Klaus Sasse
- 👤 Anita VON Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:48
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D471/12; C07D471/14; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A photographic material comprising a support layer and, applied thereto, at least one light sensitive silver halide emulsion layer and, optionally, further layers, wherein at least one layer contains a compound corresponding to formula (I) below: ##STR14## in which R represents alkyl, alkenyl, aryl, aralkyl or cycloalkyl; R 1 , R 2 and R 3 which may be the same or different, represent hydrogen, alkyl, aryl, cycloalkyl or aralkyl; R 4 represents hydrogen or --COR 5 ; R 5 represents alkyl, aryl, cycloalkyl, aralkyl or --OR 6 and R 6 represents alkyl, aryl, cycloalkyl or aralkyl said compound being present in an amount sufficient to stabilize said photographic material against fogging.
Claim 2
Dependent Claim
111 words
A photographic material comprising a support layer and, applied thereto, at least one light sensitive silver halide emulsion layer and, optionally, further layers, wherein at least one layer contains a compound corresponding to formula (I) below: ##STR14## in which R represents alkyl, alkenyl, aryl, aralkyl or cycloalkyl; R 1 , R 2 and R 3 which may be the same or different, represent hydrogen, alkyl, aryl, cycloalkyl or aralkyl; R 4 represents hydrogen or --COR 5 ; R 5 represents alkyl, aryl, cycloalkyl, aralkyl or --OR 6 and R 6 represents alkyl, aryl, cycloalkyl or aralkyl said compound being present in an amount sufficient to stabilize said photographic material against fogging.
Claim 3
Dependent Claim
86 words
A material as claimed in claim 1, wherein R represents alkyl or alkenyl containing from 1 to 6 carbon atoms; phenyl; or aralkyl containing at most 10 carbon atoms, R 1 , R 2 and R 3 which may be the same or different and represent hydrogen, alkyl containing from 1 to 4 carbon atoms or phenyl, R 4 represents hydrogen or --COR 5 , R 5 represents alkyl containing from 1 to 3 carbon atoms or a C 1 -C 6 -alkoxy or cycloalkoxy radical.
Claim 4
Dependent Claim
25 words
A material as claimed in claim 1, wherein in addition to a light sensitive silver halide emulsion layer, it contains a layer containing colloidal silver.
Claim 5
Dependent Claim
27 words
A material as claimed in claim 1, wherein compound I is present in a quantity of from 20 mg to 2 g per mole of silver halide.
Claim 6
Dependent Claim
33 words
A material as claimed in claim 3, wherein compound I is present in the layer containing the colloidal silver in a quantity of from 20 mg to 2 g per kg of silver.
Claim 7
Dependent Claim
13 words
A material as claimed in claim 1, wherein the material contains colour couplers.
Claim 8
Dependent Claim
111 words
A process for color developing a photographic material containing at least one supported light sensitive silver halide emulsion layer, wherein the color development is carried out in the presence of a compound corresponding to formula I below: ##STR15## in which R represents alkyl, alkenyl, aryl, aralkyl or cycloalkyl; R 1 , R 2 and R 3 which may be the same or different, represent hydrogen, alkyl, aryl, cycloalkyl or aralkyl; R 4 represents hydrogen or --COR 5 ; R 5 represents alkyl, aryl, cycloalkyl, aralkyl or --OR 6 and R 6 represents alkyl, aryl, cycloalkyl, aralkyl said compound being present in an amount sufficient to stabilize said photographic material against fogging.
Claim 9
Dependent Claim
111 words
A process for color developing a photographic material containing at least one supported light sensitive silver halide emulsion layer, wherein the color development is carried out in the presence of a compound corresponding to formula I below: ##STR15## in which R represents alkyl, alkenyl, aryl, aralkyl or cycloalkyl; R 1 , R 2 and R 3 which may be the same or different, represent hydrogen, alkyl, aryl, cycloalkyl or aralkyl; R 4 represents hydrogen or --COR 5 ; R 5 represents alkyl, aryl, cycloalkyl, aralkyl or --OR 6 and R 6 represents alkyl, aryl, cycloalkyl, aralkyl said compound being present in an amount sufficient to stabilize said photographic material against fogging.
References Cited (Backward Citations)
US2743181A
Cited
US3244521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |