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US4571376A
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Color diffusion transfer photographic film unit with 1-M-(methyl or ethyl)phenyl-4-methyl-4-hydroxymethyl pyrazolidinones
Assignee: Fujifilm Holdings Corp
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Filing: 1985-06-19
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Granted: 1986-02-18
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Expires: 2005-06-19
Abstract
Abstract A color diffusion photographic film unit comprising (a) a light sensitive element comprising at least one photosensitive silver halide emulsion layer associated with a redox compound adapted to release a diffusible dye, (b) an image receiving element, and (c) an alkaline processing composition element, wherein a 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent of the following general formula (I) or a precursor thereof is incorporated in at least one of said elements (a) through (c) ##STR1## wherein R 1 is methyl or ethyl and R 2 is hydrogen or a group cleavable under alkaline conditions is disclosed.
Inventors
- 👤 Toru Harada
- 👤 Shigeo Hirano
- 👤 Shigeru Nakamura
- 👤 Isao Shimamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:44
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; G; G03; G03C; G03C8/00; G03C8/02; G03C8/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
A color diffusion photographic film unit comprising (a) a light sensitive element comprising at least one photosensitive silver halide emulsion layer associated with a redox compound adapted to release a diffusible dye, (b) an image receiving element, and (c) an alkaline processing composition element, wherein a 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent of the following general formula (I) or a precursor thereof is incorporated in at least one of said elements (a) through (c) ##STR11## wherein R 1 is methyl or ethyl and R 2 is hydrogen or a group cleavable under alkaline conditions.
Claim 2
Dependent Claim
93 words
A color diffusion photographic film unit comprising (a) a light sensitive element comprising at least one photosensitive silver halide emulsion layer associated with a redox compound adapted to release a diffusible dye, (b) an image receiving element, and (c) an alkaline processing composition element, wherein a 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent of the following general formula (I) or a precursor thereof is incorporated in at least one of said elements (a) through (c) ##STR11## wherein R 1 is methyl or ethyl and R 2 is hydrogen or a group cleavable under alkaline conditions.
Claim 3
Dependent Claim
20 words
A color diffusion photographic film unit according to claim 1 wherein R 2 in the general formula (I) is hydrogen.
Claim 4
Dependent Claim
22 words
A color diffusion photographic film unit according to claim 1 wherein a sulfinic acid derivative is contained in the alkaline processing solution.
Claim 5
Dependent Claim
25 words
A color diffusion photographic film unit according to claim 1 wherein a neutralizing layer is provided in said image receiving element or said photosensitive element.
Claim 6
Dependent Claim
24 words
A color diffusion photographic film unit according to claim 1 wherein said image receiving element comprises a hydrophilic colloid layer containing a polymer mordant.
Claim 7
Dependent Claim
26 words
A color diffusion photographic film unit according to claim 1 wherein said redox compound adapted to release a diffusible dye is a negative working redox compound.
Claim 8
Dependent Claim
34 words
A color diffusion photographic film unit according to claim 1 wherein said 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent or said precursor thereof is used in combination with at least one other 3-pyrazolidinone electron transfer agent.
Claim 9
Dependent Claim
38 words
A color diffusion photographic film unit according to claim 7 wherein said other 3-pyrazolidinone electron transfer agent is used in a proportion of about 5 to 80 mole percent relative to said 1-m-alkyl substituted phenyl-3-pyrazolidinone electron transfer agent.
Claim 10
Dependent Claim
18 words
A color diffusion photographic film unit according to claim 7 wherein said other 3-pyrazolidinone developing agent is 1-phenyl-4-methyl-4'-hydroxymethyl-3-pyrazolidinone.
Claim 11
Dependent Claim
35 words
A color diffusion photographic film unit according to claim 8 wherein said other 3-pyrazolidinone electron transfer agent is used in a proportion of about 20-60 mole percent relative to said 1-m-alkyl-substituted phenyl-3-pyrazolidinone electron transfer agent.
Claim 12
Dependent Claim
33 words
A color diffusion photographic film unit according to claim 1 wherein R 2 is selected from the group consisting of acetyl, mono-, di- or trichloroacetyl, perfluoroacyl, pyruvyl, alkoxyacyl, nitrobenzoyl, cyanobenzoyl, sulfonyl and sulfinyl.
Claim 13
Dependent Claim
23 words
A color diffusion photographic film unit according to claim 1 wherein said electron transfer agent is incorporated in said alkaline processing composition element.
Claim 14
Dependent Claim
32 words
A color diffusion photographic film unit according to claim 1 wherein said electron transfer agent is available in the light sensitive element in an amount of 0.2 to 2 g/m 2 .
Claim 15
Dependent Claim
28 words
A color diffusion photographic film unit according to claim 3 wherein the ratio of said sulfinic acid derivative to electron transfer agent is 0.1 to 10 by mole.
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) | 1989-02-17 | 1989-08-19 | 1990-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-17 | 1993-08-19 | 1994-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-17 | 1997-08-19 | 1998-02-18 | $7700.00 | Window Closed / Lapsed |