Patent US3926631A successfully refreshed from Google Patents.
US3926631A
Expired / Lapsed
US
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Silver halide photographic light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1974-04-15
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Granted: 1975-12-16
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Expires: 1994-04-15
Abstract
Abstract A light-sensitive silver halide emulsion containing a 5pyrazolone coupler in which the 4-position is substituted with a carbonic acid ester group or an oxalic acid ester group.
Inventors
- 👤 Atsuaki Arai
- 👤 Yasushi Oishi
- 👤 Minoru Yamada
- 👤 Nobuo Furutachi
- 👤 Kotaro Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:48
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
15 words
A light-sensitive silver halide emulsion containing a coupler having the General Formula (I) or (II)
Claim 2
Dependent Claim
15 words
A light-sensitive silver halide emulsion containing a coupler having the General Formula (I) or (II)
Claim 3
Dependent Claim
38 words
The light-sensitive silver halide emulsion of claim 1, wherein said light-sensitive silver halide emulsion contains a p-substituted phenol in an effective amount to stabilize the dye image formed upon development with an aromatic primary amino color developing agent.
Claim 4
Dependent Claim
25 words
The light-sensitive silver halide emulsion of claim 2, wherein said p-substituted phenol is a hydroquinone derivative, a gallic acid derivative, a p-alkoxyphenol or a p-oxyphenol.
Claim 5
Dependent Claim
15 words
The light-sensitive silver halide emulsion of claim 3, wherein said p-substituted phenol is a p-oxyphenol.
Claim 6
Dependent Claim
27 words
The light-sensitive silver halide emulsion of claim 3, wherein said p-substituted phenol is a hydroquinone derivative having a hydrophobic residue containing about 8 to 18 carbon atoms.
Claim 7
Dependent Claim
21 words
The light-sensitive silver halide emulsion of claim 3, wherein said p-substituted phenol is a 5-hydroxycoumaran, a 6-hydroxy coumaran, or a 6,6''-dihydroxyspirochroman.
Claim 8
Dependent Claim
19 words
The light-sensitive silver halide emulsion of claim 6, wherein said light sensitive silver halide emulsion contains a hydroquinone derivative.
Claim 9
Dependent Claim
30 words
The light-sensitive silver halide emulsion of claim 1, wherein said silver halide emulsion contains additionally a 4-equivalent 5-pyrazolone compound in which the 4-position is unsubstituted and/or a colored magenta coupler.
Claim 10
Dependent Claim
48 words
A light-sensitive photographic element comprising a support having thereon at least one light-sensitive layer comprising a hydrophilic colloid silver halide emulsion having dispersed therein an uncolored dye image forming two equivalent coupler selected from the group consisting of the couplers represented by the General Formula (I) and (II)
Claim 11
Dependent Claim
48 words
A light-sensitive photographic element comprising a support having thereon at least one light-sensitive layer comprising a hydrophilic colloid silver halide emulsion having dispersed therein an uncolored dye image forming two equivalent coupler selected from the group consisting of the couplers represented by the General Formula (I) and (II)
Claim 12
Dependent Claim
35 words
The light-sensitive photographic element of claim 9, wherein said light-sensitive element contains a p-substituted phenol in an effective amount to stabilize the dye image formed upon development with an aromatic primary amino color developing agent.
Claim 13
Dependent Claim
24 words
The light-sensitive photographic element of claim 10, wherein said p-substituted phenol is a hydroquinone derivative, a gallic acid derivative, a p-alkoxyphenol or a p-oxyphenol.
Claim 14
Dependent Claim
14 words
The light-sensitive photographic element of claim 11, wherein said p-substituted phenol is a p-oxyphenol.
Claim 15
Dependent Claim
26 words
The light-sensitive photographic element of claim 11, wherein said p-substituted phenol is a hydroquinone derivative having a hydrophobic residue containing about 8 to 18 carbon atoms.
Claim 16
Dependent Claim
19 words
The light-sensitive photographic element of claim 11, wherein said p-substituted phenol is a 5-hydroxycoumaran, a 6-hydroxycoumaran, or a 6,6''-dihydroxyspirochroman.
Claim 17
Dependent Claim
17 words
The light sensitive photographic element of claim 14, wherein said light-sensitive photographic element contains a hydroquinone derivative.
Claim 18
Dependent Claim
29 words
The light-sensitive photographic element of claim 9, wherein said silver halide emulsion contains additionally a 4-equivalent 5-pyrazolone compound in which the 4-position is unsubstituted and/or a colored magenta coupler.
Claim 19
Dependent Claim
36 words
A process of forming a color image which comprises developing a silver halide photographic emulsion with an aromatic primary amine as a color developing agent in the presence of a coupler as defined in claim 1.
Claim 20
Dependent Claim
43 words
A process of forming a color image which comprises developing an exposed silver halide photographic emulsion with an alkaline aqueous solution containing an aromatic primary amine color developing agent in the presence of a magenta-forming coupler represented by General Formula (I) or (II)
Claim 21
Dependent Claim
43 words
A process of forming a color image which comprises developing an exposed silver halide photographic emulsion with an alkaline aqueous solution containing an aromatic primary amine color developing agent in the presence of a magenta-forming coupler represented by General Formula (I) or (II)
Claim 22
Dependent Claim
35 words
A process of forming a color image which comprises exposing a light-sensitive material comprising a support having thereon a silver halide photographic emulsion layer containing a magenta-forming coupler represented by General Formula (I) or (II)
Claim 23
Dependent Claim
35 words
A process of forming a color image which comprises exposing a light-sensitive material comprising a support having thereon a silver halide photographic emulsion layer containing a magenta-forming coupler represented by General Formula (I) or (II)
Claim 24
Dependent Claim
37 words
A PROCESS OF FORMING A COLOR IMAGE WHICH COMPRISES DEVELOPING A LIGHT-SENSITIVE MATERIAL COMPRISING A SUPPORT HAVING THEREON A SILVER HALIDE PHOTOGRAPHIC EMULSION LAYER IN COMBINATION WITH A MAGENTA-FORMING COUPLER HAVING THE GENERAL FORMULA (I) OR (II)
Claim 25
Dependent Claim
37 words
A PROCESS OF FORMING A COLOR IMAGE WHICH COMPRISES DEVELOPING A LIGHT-SENSITIVE MATERIAL COMPRISING A SUPPORT HAVING THEREON A SILVER HALIDE PHOTOGRAPHIC EMULSION LAYER IN COMBINATION WITH A MAGENTA-FORMING COUPLER HAVING THE GENERAL FORMULA (I) OR (II)
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |