US4179293A
Expired / Lapsed
US
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Color photographic light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1978-08-09
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Granted: 1979-12-18
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Expires: 1998-08-09
Abstract
Abstract A color photographic light-sensitive material containing at least one hydroquinone compound substituted with one or two tertiary alkyl groups having 15 carbon atoms, or a precursor thereof. The hydroquinone compounds are particularly useful for preventing color fog or color stain which is observed with color photographic light-sensitive materials.
Inventors
- 👤 Shigeo Hirano
- 👤 Keiichi Adachi
- 👤 Seiki Sakanoue
- 👤 Takayoshi Kamio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:26
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/16; G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
57 words
A color photographic light-sensitive material comprising a support having thereon at least one layer of a silver halide photographic emulsion with the light-sensitive material containing at least one liquid hydroquinone compound substituted with one or two tertiary alkyl groups having 15 carbon atoms, or a precursor thereof, wherein said tertiary alkyl groups individually have 15 carbon atoms.
Claim 2
Dependent Claim
57 words
A color photographic light-sensitive material comprising a support having thereon at least one layer of a silver halide photographic emulsion with the light-sensitive material containing at least one liquid hydroquinone compound substituted with one or two tertiary alkyl groups having 15 carbon atoms, or a precursor thereof, wherein said tertiary alkyl groups individually have 15 carbon atoms.
Claim 3
Dependent Claim
30 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is the reaction product of hydroquinone with 3,7,11-trimethyldodecan-3-ol obtained in the presence of a Lewis acid.
Claim 4
Dependent Claim
49 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is a mixture of isomers of a hydroquinone compound in which the 2- and 5-positions or the 2- and 6-positions of the benzene moiety are substituted with a tertiary alkyl group having 15 carbon atoms.
Claim 5
Dependent Claim
53 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is represented by the following general formula (I): ##STR9## wherein R 1 represents a hydrogen atom, ##STR10## with R 2 being present in the 5- or 6-position of the benzene moiety when R 1 is not a hydrogen atom.
Claim 6
Dependent Claim
16 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is 2,5-bis(1-ethyl-1,5,9-trimethyldecyl)hydroquinone.
Claim 7
Dependent Claim
21 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is a mixture of 2,5-bis(1-ethyl-1,5,9-trimethyldecyl)hydroquinone and 2-(1-ethyl-1,5,9-trimethyldecyl)hydroquinone.
Claim 8
Dependent Claim
26 words
The color photographic light-sensitive material as claimed in claim 1, wherein the hydroquinone compound is present in a photographic emulsion layer or a layer adjacent thereto.
Claim 9
Dependent Claim
22 words
The color photographic light-sensitive material as claimed in claim 1, wherein the color photographic light-sensitive material further contains a dye image-providing compound.
Claim 10
Dependent Claim
43 words
The color photographic light-sensitive material as claimed in claim 8, wherein the hydroquinone compound is present in a layer containing the dye image-providing material in an amount of about 0.1 to about 150% by weight to the amount of the dye image-providing material.
Claim 11
Dependent Claim
33 words
The color photographic light-sensitive material as claimed in claim 9, wherein the hydroquinone compound is present in an amount of 0.2 to 20% by weight to the amount of the dye image-providing material.
Claim 12
Dependent Claim
55 words
The color photographic light-sensitive material as claimed in claim 8, wherein the hydroquinone compound is present in a layer other than a layer containing the dye image-providing material in an amount of about 1 to about 1,000% by weight to the amount of said dye image-providing material in said layer containing said dye image-providing material.
Claim 13
Dependent Claim
33 words
The color photographic light-sensitive material as claimed in claim 11, wherein the hydroquinone compound is present in an amount of 10 to 400% by weight to the amount of the dye image-providing material.
Claim 14
Dependent Claim
25 words
The color photographic light-sensitive material as claimed in claim 8, wherein said dye image-providing compound is a color-forming coupler or a diffusible dye-releasing redox compound.
Claim 15
Dependent Claim
49 words
The color photographic light-sensitive material as claimed in claim 8, wherein said light-sensitive material contains a red-sensitive silver halide emulsion layer containing a cyan color-forming coupler, a green-sensitive silver halide emulsion layer containing a magenta color-forming coupler and a blue-sensitive silver halide emulsion layer containing a yellow color-forming coupler.
Claim 16
Dependent Claim
58 words
The color photographic light-sensitive material as claimed in claim 8, wherein said light-sensitive material contains a layer containing a cyan dye-releasing redox compound, a red-sensitive silver halide emulsion layer, a layer containing a magenta dye-releasing redox compound, a green-sensitive silver halide emulsion layer, a layer containing a yellow dye-releasing redox compound and a blue-sensitive silver halide emulsion layer.
Claim 17
Dependent Claim
17 words
The color photographic light-sensitive material as claimed in claim 1, wherein all hydroquinone compounds present are liquid.
Claim 18
Dependent Claim
18 words
The color photographic light-sensitive material as claimed in claim 1, wherein only one liquid hydroquinone compound is present.
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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |