US4409324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer color photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1982-09-21
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Granted: 1983-10-11
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Expires: 2002-09-21
Abstract
Abstract A multilayer color photographic sensitive material is disclosed. The material is comprised of a support base and a silver halide emulsion layer. The material contains at least one layer containing a high boiling solvent and an oil-soluble coupler, wherein the volume ratio of solvent to coupler is 1/2 or less, and a compound represented by the general formula (I): ##STR1## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and R 1 , R 2 , R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, an alkyl group or an aryl group. The material produces sharp images even though it contains a low oil/coupler ratio. Furthermore, there is no retardation of development.
Inventors
- 👤 Takatoshi Ishikawa
- 👤 Akio Mitsui
- 👤 Masakazu Morigaki
- 👤 Takashi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:44
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/392; G03C7/39208; G03C7/3924; G03C7/39244; G03C7/39252
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
A multi-layered color photographic sensitive material, comprising: a support base; a silver halide emulsion layer; and a layer containing a high boiling solvent and an oil-soluble coupler, wherein the volume ratio of solvent to coupler is 1/2 or less, and a compound represented by the general formula (I): ##STR4## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and R 1 , R 2 , R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, an alkyl group or an aryl group.
Claim 2
Dependent Claim
96 words
A multi-layered color photographic sensitive material, comprising: a support base; a silver halide emulsion layer; and a layer containing a high boiling solvent and an oil-soluble coupler, wherein the volume ratio of solvent to coupler is 1/2 or less, and a compound represented by the general formula (I): ##STR4## wherein X is a hydrogen atom or an acetyl group, R is an aryl group, and R 1 , R 2 , R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, an alkyl group or an aryl group.
Claim 3
Dependent Claim
21 words
A multi-layered color photographic sensitive material as claimed in claim 1, wherein R 1 or R 2 represents a phenyl group.
Claim 4
Dependent Claim
30 words
A multi-layered color photographic sensitive material as claimed in any of claims 1 or 2, wherein R 3 or R 4 represents an alkyl group substituted by an acyloxy group.
Claim 5
Dependent Claim
36 words
A multi-layered color photographic sensitive material as claimed in claim 3, wherein the compound represented by the general formula (I) is present in an amount of 0.001 mol to 1 mol per mol of silver halide.
Claim 6
Dependent Claim
36 words
A multi-layered color photographic sensitive material as claimed in claim 4, wherein the compound represented by the general formula (I) is present in an amount of 0.005 mol to 0.5 mol per mol of silver halide.
Claim 7
Dependent Claim
27 words
A multi-layered color photographic sensitive material as claimed in claim 1, wherein the volume ratio of solvent to coupler is in the range of 0.1 to 0.5.
Claim 8
Dependent Claim
32 words
A multi-layered color photographic sensitive material as claimed in claim 1, wherein R 1 , R 2 , R 3 and R 4 represent alkyl groups containing 1 to 10 carbon atoms.
Claim 9
Dependent Claim
29 words
A multi-layered color photograpic sensitive material as claimed in claim 1, wherein the high boiling solvent is an organic solvent having a boiling point of 180° C. or more.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |