Patent US4780403A successfully refreshed from Google Patents.
US4780403A
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Silver halide color photographic material containing disulfide type bleach accelerator
Assignee: Fujifilm Holdings Corp
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Filing: 1986-12-11
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Granted: 1988-10-25
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Expires: 2006-12-11
Abstract
Abstract A silver halide color photographic material comprising a support having thereon at least one photographic emulsion layer containing tabular silver halide grains having an average aspect ratio of 5 or more and the silver halide color photographic material containing at least one compound represented by formula (I) ##STR1## wherein R 1 and R 2 each represents a hydrogen atom, an alkyl group or an acyl group provided that both R 1 and R 2 do not represent hydrogen atoms at the same time, or R 1 and R 2 form a ring; and r represents an integer of from 1 to 3. The silver halide color photographic material can be bleached in a short period of time using a bleaching agent having a weak bleaching ability which meets requirements of preventing environmental pollution. A method for processing the silver halide color photographic material by subjecting to color development, then to treatment with a bath having a bleaching ability is also disclosed.
Inventors
- 👤 Shinzo Kishimoto
- 👤 Keiji Mihayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39236
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
103 words
A silver halide color photographic material comprising a support having thereon at least one photographic emulsion layer containing tabular silver halide grains having an average aspect ratio of 5 or more and the silver halide color photographic material containing at least one compound represented by formula (I) ##STR11## wherein R 1 and R 2 each represents a hydrogen atom, an alkyl group or an acyl group, provided that R 1 and R 2 do not both represent hydrogen atoms at the same time, or R 1 and R 2 together form a ring; and r represents an integer of from 1 to 3.
Claim 2
Dependent Claim
103 words
A silver halide color photographic material comprising a support having thereon at least one photographic emulsion layer containing tabular silver halide grains having an average aspect ratio of 5 or more and the silver halide color photographic material containing at least one compound represented by formula (I) ##STR11## wherein R 1 and R 2 each represents a hydrogen atom, an alkyl group or an acyl group, provided that R 1 and R 2 do not both represent hydrogen atoms at the same time, or R 1 and R 2 together form a ring; and r represents an integer of from 1 to 3.
Claim 3
Dependent Claim
37 words
A silver halide color photographic material as claimed in claim 1, wherein the alkyl group represented by R 1 or R 2 is a substituted or unsubstituted lower alkyl group having from 1 to 5 carbon atoms.
Claim 4
Dependent Claim
26 words
A silver halide color photographic material as claimed in claim 2, wherein the alkyl group is a methyl group, an ethyl group or a propyl group.
Claim 5
Dependent Claim
29 words
A silver halide color photographic material as claimed in claim 1, wherein the acyl group represented by R 1 or R 2 has from 2 to 4 carbon atoms.
Claim 6
Dependent Claim
23 words
A silver halide color photographic material as claimed in claim 4, wherein the acyl group is an acetyl group or a propionyl group.
Claim 7
Dependent Claim
43 words
A silver halide color photographic material as claimed in claim 1, wherein a substituent for the group represented by R 1 or R 2 is selected from a hydroxyl group, a carboxyl group, a sulfo group, an alkylsulfonyl group and an amino group.
Claim 8
Dependent Claim
37 words
A silver halide color photographic material as claimed in claim 1, wherein the total amount of the compound represented by formula (I) added is in a range of from 1×10 -5 to 1×10 -2 mol/m 2 .
Claim 9
Dependent Claim
26 words
A silver halide color photographic material as claimed in claim 1, wherein the tabular silver halide grains have an aspect ratio of from 5 to 8.
Claim 10
Dependent Claim
26 words
A silver halide color photographic material as claimed in claim 1, wherein the tabular silver halide grains have a diameter of from 0.3 to 5.0 μm.
Claim 11
Dependent Claim
25 words
A silver halide color photographic material as claimed in claim 1, wherein the tabular silver halide grains have a thickness of 0.4 μm or less.
Claim 12
Dependent Claim
26 words
A silver halide color photographic material as claimed in claim 9, wherein the tabular silver halide grains have a diameter of from 0.5 to 3.0 μm.
Claim 13
Dependent Claim
25 words
A silver halide color photographic material as claimed in claim 10, wherein the tabular silver halide grains have a thickness of 0.3 μm or less.
Claim 14
Dependent Claim
28 words
A silver halide color photographic material as claimed in claim 1, wherein the tabular silver halide grains are subjected to monodispersion in a tabular grain silver halide emulsion.
Claim 15
Dependent Claim
41 words
A silver halide color photographic material as claimed in claim 13, wherein in the tabular grain silver halide emulsion, at least 95% of the total silver halide grains have a size within the range of ±60% of the number-average grain size.
Claim 16
Dependent Claim
35 words
A silver halide color photographic material as claimed in claim 1, wherein the tabular silver halide grains occupy 50% or more based on the total project area of silver halide grains contained in the emulsion.
Claim 17
Dependent Claim
35 words
A silver halide color photographic material as claimed in claim 15, wherein the tabular silver halide grains occupy 70% or more based on the total project area of silver halide grains contained in the emulsion.
Claim 18
Dependent Claim
35 words
A silver halide color photographic material as claimed in claim 16, wherein the tabular silver halide grains occupy 90% or more based on the total project area of silver halide grains contained in the emulsion.
Claim 19
Dependent Claim
41 words
A silver halide color photographic material as claimed in claim 13, wherein in the tabular grain silver halide emulsion, at least 95% of the total silver halide grains have a size within the range of ±40% of the number-average grain size.
Claim 20
Dependent Claim
41 words
A silver halide color photographic material as claimed in claim 13, wherein in the tabular grain silver halide emulsion, at least 95% of the total silver halide grains have a size within the range of ±20% of the number-average grain size.
Claim 21
Dependent Claim
37 words
A silver halide color photographic material as claimed in claim 1, wherein the total amount of the compound represented by formula (1) added is in a range of from 2×10 -5 to 5×10 -3 mol/m 2 .
Claim 22
Dependent Claim
35 words
A silver halide color photographic material as claimed in claim 1, wherein the total amount of the compound represented by formula (I) added is in a range of from 5×10 -5 to 2×10 -3 .
Claim 23
Dependent Claim
27 words
A silver halide color photographic material as claimed in claim 20, wherein the tabular silver halide grains have an average aspect ratio of from 5 to 8.
Claim 24
Dependent Claim
27 words
A silver halide color photographic material as claimed in claim 21, wherein the tabular silver halide grains have an average aspect ratio of from 5 to 8.
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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |