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US4582779A
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Internal latent image-type direct positive silver halide emulsions and photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1984-06-28
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Granted: 1986-04-15
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Expires: 2004-06-28
Abstract
Abstract A previously unfogged internal latent image-type direct positive silver halide emulsion and a photographic material incorporating such emulsion are described, wherein the emulsion contains at least one sensitizing dye represented by formula (I): ##STR1## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfur atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or ##STR2## wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group.
Inventors
- 👤 Satosi Kubota
- 👤 Tadao Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48538; G03C1/48584; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
132 words
A previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR12## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfur atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or ##STR13## wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group.
Claim 2
Dependent Claim
132 words
A previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR12## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfur atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or ##STR13## wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group.
Claim 3
Dependent Claim
31 words
An unfogged internal latent image direct positive silver halide emulsion as in claim 1, wherein the sulfoalkyl group represented by R 1 or R 2 has 4 or less carbon atoms.
Claim 4
Dependent Claim
42 words
An unfogged internal latent image direct positive silver halide emulsion as in claim 1, wherein the sulfoalkyl group represented by R 1 or R 2 is selected from the group consisting of a 2-sulfoethyl group, a 3-sulfopropyl group, and a 4-sulfobutyl group.
Claim 5
Dependent Claim
41 words
An unfogged internal latent image direct positive silver halide emulsion as in claim 1, wherein the sensitizing dye represented by formula (I) is used in a concentration of from about 1×10 -5 to 2×10 -3 mol per mol of silver halide.
Claim 6
Dependent Claim
146 words
A photographic material comprising a support having thereon at least one photographic layer containing a previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR14## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfo atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or ##STR15## wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group.
Claim 7
Dependent Claim
146 words
A photographic material comprising a support having thereon at least one photographic layer containing a previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR14## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfo atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or ##STR15## wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group.
Claim 8
Dependent Claim
24 words
A photographic material as in claim 5, wherein the sulfoalkyl group represented by R 1 or R 2 has 4 or less carbon atoms.
Claim 9
Dependent Claim
35 words
A photographic material as in claim 5, wherein the sulfoalkyl group represented by R 1 or R 2 is selected from the group consisting of a 2-sulfoethyl group, a 3-sulfopropyl group, and a 4-sulfobutyl group.
Claim 10
Dependent Claim
35 words
A photographic material as in claim 5, wherein the spectral sensitizing dye represented by formula (I) is used in a concentration of from about 1×10 -5 to 2×10 -3 mol per mol of silver halide.
Claim 11
Dependent Claim
40 words
A photographic material as claimed in claim 5, wherein said photographic material further contains a hydrazine compound as a fogging agent in said silver halide emulsion layer or in a hydrophilic colloid layer adjacent to said silver halide emulsion layer.
Claim 12
Dependent Claim
77 words
A photographic material as claimed in claim 9, wherein said hydrazine compound is represented by formula (II): ##STR16## wherein R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue; R 5 represents a hydrogen atom or an aliphatic residue; R 6 represents a hydrogen atom, an aliphatic residue, or an aromatic residue; and Z represents a divalent aromatic residue.
Claim 13
Independent Claim
170 words
A method of forming an image comprising imagewise exposing and developing a photographic material comprising a support having thereon at least one photographic layer containing a previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR17## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfo atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or --N--R, wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group; wherein said photographic material is processed in the presence of a fogging agent.
Claim 14
Independent Claim
170 words
A method of forming an image comprising imagewise exposing and developing a photographic material comprising a support having thereon at least one photographic layer containing a previously unfogged internal latent image direct positive silver halide emulsion containing at least one spectral sensitizing dye represented by formula (I): ##STR17## wherein one of R 1 and R 2 represents a sulfoalkyl group and the other thereof represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or a pyridyl group; X represents a sulfo atom or an oxygen atom; Y represents a sulfur atom, an oxygen atom, or --N--R, wherein R represents a lower alkyl group or --CH 2 ) n .sbsb.1 O--CH 2 ) n .sbsb.2 OH, wherein n 1 and n 2 each represents an integer of 1 to 4; and W represents a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, or an unsubstituted or substituted phenyl group; wherein said photographic material is processed in the presence of a fogging agent.
Claim 15
Dependent Claim
24 words
A method as claimed in claim 11, wherein the sulfoalkyl group represented by R 1 or R 2 has four or less carbon atoms.
Claim 16
Dependent Claim
35 words
A method as claimed in claim 11, wherein the sulfoalkyl group represented by R 1 or R 2 is selected from the group consisting of a 2-sulfoethyl group, a 3-sulfopropyl group, and a 4-sulfobutyl group.
Claim 17
Dependent Claim
34 words
A method as claimed in claim 11, wherein the sensitizing dye represented by formula (I) is used in a concentration of from about 1×10 -5 to 2×10 -3 mol per mol of silver halide.
Claim 18
Dependent Claim
15 words
A method as claimed in claim 11, wherein said fogging agent is a hydrazine compound.
Claim 19
Dependent Claim
77 words
A method as claimed in claim 15, wherein said fogging agent is represented by the formula (II): ##STR18## wherein R 3 and R 4 , which may be the same or different, each represents a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue; R 5 represents a hydrogen atom or an aliphatic residue; R 6 represents a hydrogen atom, an aliphatic residue, or an aromatic residue; and Z represents a divalent aromatic residue.
Claim 20
Dependent Claim
31 words
A method as claimed in claim 11, wherein said fogging agent is contained in silver halide emulsion layer or in a hydrophilic colloid layer adjacent to said silver halide emulsion layer.
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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) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |