Patent EP0255085A2 successfully refreshed from Google Patents.
EP0255085A2
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EP
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Photographic element and process
Assignee: Eastman Kodak Co
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Filing: 1987-07-27
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Granted: —
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Expires: 2007-07-27
Abstract
Abstract Photographic compounds capable of releasing a photographically useful group are more effective in photographic materials when the photographic compounds comprise at least two differing timing groups in sequence between a carrier moiety and the photographically useful group. The two timing groups in sequence enable improved timing and control of release of the photographically useful group.
Inventors
- 👤 Paul Andrew Eastman Kodak Company Burns
- 👤 Terry Ray Eastman Kodak Company Taber
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:39
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30576
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
In a photographic element comprising a support, at least one photographic emulsion layer and at least one compound A capable of releasing a photographically useful group, the improvement wherein the compound A comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups upon processing the photographic element.
Claim 2
Dependent Claim
71 words
In a photographic element comprising a support, at least one photographic emulsion layer and at least one compound A capable of releasing a photographically useful group, the improvement wherein the compound A comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups upon processing the photographic element.
Claim 3
Dependent Claim
69 words
In a photographic element comprising a support, at least one photographic emulsion layer and at least one coupler capable of releasing a photographically useful group, the improvement wherein the coupler comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups upon processing the photographic element.
Claim 4
Dependent Claim
69 words
In a photographic element comprising a support, at least one photographic emulsion layer and at least one coupler capable of releasing a photographically useful group, the improvement wherein the coupler comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups upon processing the photographic element.
Claim 5
Dependent Claim
34 words
A photographic element as in claim 1 or 2 wherein one of the two differing groups in sequence is a group capable of intramolecular nucleophilic displacement of the remaining portion of the compound A.
Claim 6
Dependent Claim
44 words
A photographic element as in claim 1 or 2 wherein one of the two differing groups in sequence is a group capable of a reaction in which an electron is transferred down a conjugated chain to release the remaining portion of the compound A.
Claim 7
Dependent Claim
72 words
A photographic element as in claim 2 wherein the coupler is represented by the structure: wherein: COUP is a coupler moiety; T 1 is a first timing group capable of being released from COUP at the coupling position of COUP; T 2 is a second timing group capable of being released from said first timing group after said first timing group is released from COUP; and, PUG is a photographically useful group.
Claim 8
Dependent Claim
111 words
A photographic element as in claim 2 wherein the coupler s a coupler represented by the formula: wherein: R 26 is substituted or unsubstituted alkyl or subsbtuted or unsubstituted aryl; R 27 is hydrogen or a substituent which does not adversely affect timing of release of the other portions of the compound A; Ra is hydrogen or a substituent which advantageously influences the timing of release of PUG; COUP is a coupler moiety substituted in the coupling position by the remainder of the coupler; PUG is a photographically useful group; m and n are individually 0 or 1; Z 5 represents the atoms necessary to complete a carbocyclic or heterocyclic ring.
Claim 9
Dependent Claim
94 words
A photographic element as in claim 2 wherein the coupler is represented by the structure: wherein: . Ra is substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or R 34 NH; R 30 is substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; R 31 , is a hydrogen or a ballast group; R 32 is alkyl; R 33 is unsubstituted or substituted alkyl, chlorine, bromine, nitro, or alkoxy; R3 4 is substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; PUG is a photographically useful group; and n is 0, 1 or 2.
Claim 10
Dependent Claim
22 words
A photographic element as in claim 2 wherein the coupler is represented by the formula: wherein PUG is a photographically useful group.
Claim 11
Dependent Claim
74 words
A process of forming a photographic image which comprises developing an exposed photographic silver halide emulsion layer with a color developing agent in the presence of a compound A capable of releasing a photographically useful group, wherein the compound A comprises at least two differing timing groups in sequence capable upon activation of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups.
Claim 12
Dependent Claim
74 words
A process of forming a photographic image which comprises developing an exposed photographic silver halide emulsion layer with a color developing agent in the presence of a compound A capable of releasing a photographically useful group, wherein the compound A comprises at least two differing timing groups in sequence capable upon activation of timing the release of the photographically useful group and wherein two separate fragments are formed from the two differing timing groups.
Claim 13
Dependent Claim
33 words
A process as in claim 12 wherein one of the two differing timing groups in sequence is a group capable of intramolecular nucleophilic displacement release of the remaining portion of the compound A.
Claim 14
Dependent Claim
42 words
A process as in claim 12 wherein one of the two differing groups in sequence is a group capable of a type reaction in which an electron is transferred down a conjugated chain to release the remaining portion of the compound A.
Claim 15
Dependent Claim
74 words
A process as in claim 12 wherein the compound A is a coupler represented by the formula: wherein: COUP is a coupler moiety; T 1 is a first timing group capable of being released from COUP at the coupling position of COUP; T 2 is a second timing group capable of being released from said first timing group after said first timing group is released from COUP; and, PUG is a photographically useful group.
Claim 16
Dependent Claim
56 words
In a compound A capable of releasing a photographically useful group upon photographic processing, the improvement wherein the compound A comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two timing groups upon photographic processing.
Claim 17
Dependent Claim
56 words
In a compound A capable of releasing a photographically useful group upon photographic processing, the improvement wherein the compound A comprises at least two differing timing groups in sequence capable, upon activation, of timing the release of the photographically useful group and wherein two separate fragments are formed from the two timing groups upon photographic processing.
Claim 18
Dependent Claim
63 words
A photographic coupler represented by the structure: wherein COUP is a coupler moiety; T 1 is a first timing group capable of being released from COUP at the coupling position of COUP; T 2 is a second timing group, different from Ti, capable of being released from T 1 after T 1 is released from COUP; and PUG is a photographically useful group.
Claim 19
Dependent Claim
63 words
A photographic coupler represented by the structure: wherein COUP is a coupler moiety; T 1 is a first timing group capable of being released from COUP at the coupling position of COUP; T 2 is a second timing group, different from Ti, capable of being released from T 1 after T 1 is released from COUP; and PUG is a photographically useful group.
Claim 20
Dependent Claim
100 words
A photographic coupler represented by the formula: wherein: R 26 is substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; R 27 is hydrogen or a substituent which does not adversely affect timing of release of the other portions of the photographic coupler; Ra is hydrogen or a substituent which advantageously influences the timing of release of PUG; COUP is a coupler moiety substituted in the coupling position by the remainder of the coupler; PUG is a photographically useful group; m and n are individually 0 or 1; Zs represents the atoms necessary to complete a carbocyclic or heterocyclic ring.
Claim 21
Dependent Claim
100 words
A photographic coupler represented by the formula: wherein: R 26 is substituted or unsubstituted alkyl, or substituted or unsubstituted aryl; R 27 is hydrogen or a substituent which does not adversely affect timing of release of the other portions of the photographic coupler; Ra is hydrogen or a substituent which advantageously influences the timing of release of PUG; COUP is a coupler moiety substituted in the coupling position by the remainder of the coupler; PUG is a photographically useful group; m and n are individually 0 or 1; Zs represents the atoms necessary to complete a carbocyclic or heterocyclic ring.
Claim 22
Dependent Claim
14 words
A photographic coupler represented by the formula: wherein PUG is a photographically useful group.
Claim 23
Dependent Claim
14 words
A photographic coupler represented by the formula: wherein PUG is a photographically useful group.
References Cited (Backward Citations)
No citation records indexed.
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