Patent US4088383A successfully refreshed from Google Patents.
Patent US4235957A successfully refreshed from Google Patents.
US4235957A
Expired / Lapsed
US
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Thermal silver-dye bleach element and process
Assignee: Eastman Kodak Co
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Filing: 1979-01-25
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Granted: 1980-11-25
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Expires: 1999-01-25
Abstract
Abstract In a dry physical development photothermographic element for a dry thermal silver-dye bleach process wherein the element comprises a silver halide complexing concentration of a silver halide complexing agent improvements are provided when the complexing agent is an organic ammonium chloride, bromide or iodide. After imagewise exposure of the element, a dye image can be produced by uniformly heating the element. Improvements are also produced by providing a dry activator element for producing a dye image in a separate photographic element by means of a dry physical development thermal dye-bleach process, wherein the activator element comprises a support having thereon a layer comprising a synthetic hydrophobic polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, as described, a bleachable dye and a thermal solvent.
Inventors
- 👤 Carl F. Kohrt
- 👤 Roland G. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:38
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
90 words
In a dry physical development photothermographic element for a dry, thermal silver-dye bleach process said element comprising a support having thereon (A) a first layer comprising photographic silver halide and (B), contiguous to said first layer, a second layer comprising a binder, a silver halide complexing concentration of a silver halide complexing agent and a thermal solvent, said element also comprising a bleachable dye in reactive association with the photographic silver halide, the improvement wherein said element comprises (a) as said complexing agent an organic ammonium chloride, bromide or iodide.
Claim 2
Dependent Claim
90 words
In a dry physical development photothermographic element for a dry, thermal silver-dye bleach process said element comprising a support having thereon (A) a first layer comprising photographic silver halide and (B), contiguous to said first layer, a second layer comprising a binder, a silver halide complexing concentration of a silver halide complexing agent and a thermal solvent, said element also comprising a bleachable dye in reactive association with the photographic silver halide, the improvement wherein said element comprises (a) as said complexing agent an organic ammonium chloride, bromide or iodide.
Claim 3
Dependent Claim
60 words
A photothermographic element as in claim 1 wherein said improvement comprises the combination of said (a) with (b) in said first layer, (i) an oxidation-reduction image-forming combination comprising (I) an organic silver salt oxidizing agent, with (II) a reducing agent, and (ii) a synthetic, hydrophobic polymeric binder, and (c) as binder in the second layer a synthetic, hydrophobic polymeric binder.
Claim 4
Dependent Claim
89 words
A photothermographic element as in caim 1 wherein said complexing agent consists essentially of a compound selected from the group represented by the structures ##STR83## wherein Z represents the atoms selected from carbon atoms and nitrogen atoms which, together with N, are necessary to complete a 5-membered or 6-membered heterocyclic nucleus, R 1 is alkyl containing 1 to 15 carbon atoms or aryl containing 6 to 10 carbon atoms, R 2 , R 3 , R 4 and R 5 are, individually, alkyl containing 1 to 4 carbon atoms.
Claim 5
Dependent Claim
89 words
A photothermographic element as in caim 1 wherein said complexing agent consists essentially of a compound selected from the group represented by the structures ##STR83## wherein Z represents the atoms selected from carbon atoms and nitrogen atoms which, together with N, are necessary to complete a 5-membered or 6-membered heterocyclic nucleus, R 1 is alkyl containing 1 to 15 carbon atoms or aryl containing 6 to 10 carbon atoms, R 2 , R 3 , R 4 and R 5 are, individually, alkyl containing 1 to 4 carbon atoms.
Claim 6
Dependent Claim
17 words
A photothermographic element as in claim 1 wherein said complexing agent consists essentially of a pyridinium bromide.
Claim 7
Dependent Claim
24 words
A photothermographic element as in claim 2 wherein said organic silver salt oxidizing agent consists essentially of a salt of a long-chain fatty acid.
Claim 8
Dependent Claim
19 words
A photothermographic element as in claim 2 wherein said organic silver salt oxidizing agent consists essentially of silver behenate.
Claim 9
Dependent Claim
18 words
A photothermographic element as in claim 2 wherein said reducing agent is a phenolic, silver halide developing agent.
Claim 10
Dependent Claim
19 words
A photothermographic element as in claim 2 wherein said binder in the first layer consists essentially of poly(vinyl butyral).
Claim 11
Dependent Claim
16 words
A photothermographic element as in claim 1 also comprising a dye mordant for said bleachable dye.
Claim 12
Dependent Claim
23 words
A photothermographic element as in claim 1 wherein said support comprises a polymer that is a dye image receiver for said bleachable dye.
Claim 13
Dependent Claim
134 words
In a dry physical development photothermographic element for a dry, thermal silver-dye bleach process said element comprising a support having thereon (A) a first layer comprising photographic silver halide and (B), contiguous to said first layer, a second layer comprising a polymeric binder, a silver haide complexing concentration of a silver halide complexing agent and a thermal solvent, said element also comprising a bleachable dye in reactive association with the photographic silver halide, the improvement wherein said element comprises, in combination, (a) as said complexing agent a compound represented by the structure: ##STR84## (b), in said first layer, (i) an oxidation-reduction image-forming combination comprising (I) silver behenate, with (II) a phenolic, silver halide developing agent, and (ii) a poly(vinyl butyral) binder, and (c), as polymeric binder in the second layer, a poly(vinyl butyral) binder.
Claim 14
Dependent Claim
134 words
In a dry physical development photothermographic element for a dry, thermal silver-dye bleach process said element comprising a support having thereon (A) a first layer comprising photographic silver halide and (B), contiguous to said first layer, a second layer comprising a polymeric binder, a silver haide complexing concentration of a silver halide complexing agent and a thermal solvent, said element also comprising a bleachable dye in reactive association with the photographic silver halide, the improvement wherein said element comprises, in combination, (a) as said complexing agent a compound represented by the structure: ##STR84## (b), in said first layer, (i) an oxidation-reduction image-forming combination comprising (I) silver behenate, with (II) a phenolic, silver halide developing agent, and (ii) a poly(vinyl butyral) binder, and (c), as polymeric binder in the second layer, a poly(vinyl butyral) binder.
Claim 15
Dependent Claim
27 words
A photothermographic element as in claim 11 wherein said bleachable dye is a compund selected from the group consisting of bleachable azo, indophenol, indoaniline and anthraquinone dyes.
Claim 16
Dependent Claim
26 words
A photothermographic element as in claim 11 wherein said bleachable dye is a phenylazoaniline dye having at least one electron withdrawing substituent on the phenylazo ring.
Claim 17
Dependent Claim
128 words
A dry physical development photothermographic element for a dry, thermal silver-dye bleach process comprising a support having thereon (A) a first layer comprising, in a hydrophobic, synthetic polymeric binder, (i) photosensitive silver halide in reactive association with (ii) an oxidation-reduction image-forming combination comprising (a) silver behenate, with (b) a phenolic silver halide developing agent consisting essentially of a compound represented by the formula: ##STR85## and (iii) a toning agent, and (B), contiguous to said first layer, a second layer comprising, in a hydrophobic, synthetic polymeric binder, (i) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR86## (ii) a thermal solvent consisting essentially of methyl anisate, and (iii) a bleachable indophenol dye represented by the formula: ##STR87##
Claim 18
Dependent Claim
128 words
A dry physical development photothermographic element for a dry, thermal silver-dye bleach process comprising a support having thereon (A) a first layer comprising, in a hydrophobic, synthetic polymeric binder, (i) photosensitive silver halide in reactive association with (ii) an oxidation-reduction image-forming combination comprising (a) silver behenate, with (b) a phenolic silver halide developing agent consisting essentially of a compound represented by the formula: ##STR85## and (iii) a toning agent, and (B), contiguous to said first layer, a second layer comprising, in a hydrophobic, synthetic polymeric binder, (i) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR86## (ii) a thermal solvent consisting essentially of methyl anisate, and (iii) a bleachable indophenol dye represented by the formula: ##STR87##
Claim 19
Dependent Claim
120 words
A dry physical development photothermographic element for a dry, thermal silver-dye bleach process comprising a support having thereon (A) a first layer comprising, in a hydrophobic, synthetic binder, (i) photosensitive silver halide in reactive association with (ii) an oxidation-reduction image-forming combination comprising (a) silver behenate, with (b) a phenolic silver halide developing agent consisting essentially of a compound by the formula: ##STR88## (iii) a toning agent, and (B) contiguous to said first layer, a second layer comprising, in a hydrophobic synthetic polymeric binder, (i) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR89## (ii) a thermal solvent, and (iii) a bleachable azoaniline dye represented by the formula: ##STR90##
Claim 20
Dependent Claim
120 words
A dry physical development photothermographic element for a dry, thermal silver-dye bleach process comprising a support having thereon (A) a first layer comprising, in a hydrophobic, synthetic binder, (i) photosensitive silver halide in reactive association with (ii) an oxidation-reduction image-forming combination comprising (a) silver behenate, with (b) a phenolic silver halide developing agent consisting essentially of a compound by the formula: ##STR88## (iii) a toning agent, and (B) contiguous to said first layer, a second layer comprising, in a hydrophobic synthetic polymeric binder, (i) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR89## (ii) a thermal solvent, and (iii) a bleachable azoaniline dye represented by the formula: ##STR90##
Claim 21
Dependent Claim
82 words
In a dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising, in a polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, a bleachable dye, and a thermal solvent, the improvement wherein said element comprises (a) as said complexing agent, an organic ammonium chloride, bromide or iodide, and (b), as the polymeric binder, a synthetic, hydrophobic polymeric binder.
Claim 22
Dependent Claim
82 words
In a dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising, in a polymeric binder, a silver halide complexing concentration of a silver halide complexing agent, a bleachable dye, and a thermal solvent, the improvement wherein said element comprises (a) as said complexing agent, an organic ammonium chloride, bromide or iodide, and (b), as the polymeric binder, a synthetic, hydrophobic polymeric binder.
Claim 23
Dependent Claim
87 words
A dry activator element as in claim 16 wherein said complexing agent consists essentially of a compound selected from the group represented by the structures: ##STR91## wherein Z represents the carbon atoms and nitrogen atoms which, together with N, are necessary to complete a 5-membered or 6-membered heterocyclic nucleus, R 1 is alkyl containing 1 to 15 carbon atoms or aryl containing 6 to 10 carbon atoms, R 2 , R 3 , R 4 and R 5 are, individually, alkyl containing 1 to 4 carbon atoms.
Claim 24
Dependent Claim
17 words
A dry activator element as in claim 16 wherein said complexing agent consists essentially of pyridinium bromide.
Claim 25
Dependent Claim
16 words
A dry activator element as in claim 16 wherein said binder consists essentially of poly(vinyl butyral).
Claim 26
Dependent Claim
17 words
A dry activator element as in claim 16 also comprising a dye mordant for said bleachable dye.
Claim 27
Dependent Claim
24 words
A dry activator element as in claim 16 wherein said support comprises a polymer that is a dye image receiver for said bleachable dye.
Claim 28
Dependent Claim
22 words
A dry activator element as in claim 16 wherein said complexing agent consists essentially of a compound represented by the structure: ##STR92##
Claim 29
Dependent Claim
28 words
A dry activator element as in claim 16 wherein said bleachable dye is a compound selected from the group consisting of bleachable azo, indophenol, indoaniline and anthraquinone dyes.
Claim 30
Dependent Claim
27 words
A dry activator element as in claim 16 wherein said bleachable dye is a phenylazoaniline dye having at least one electron withdrawing group on the phenylazo ring.
Claim 31
Dependent Claim
72 words
A dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising (a) a poly(vinyl butyral) binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR93## (c) a thermal solvent and (d) a bleachable indophenol dye represented by the formula: ##STR94##
Claim 32
Dependent Claim
72 words
A dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising (a) a poly(vinyl butyral) binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR93## (c) a thermal solvent and (d) a bleachable indophenol dye represented by the formula: ##STR94##
Claim 33
Dependent Claim
72 words
A dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising (a) a poly(vinyl butyral) binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR95## (c) a thermal solvent and (d) a bleachable azoaniline dye represented by the formula: ##STR96##
Claim 34
Dependent Claim
72 words
A dry activator element for producing a dye image by means of a dry physical development, thermal silver-dye bleach process said element comprising a support having thereon a layer comprising (a) a poly(vinyl butyral) binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR95## (c) a thermal solvent and (d) a bleachable azoaniline dye represented by the formula: ##STR96##
Claim 35
Dependent Claim
101 words
A process of thermally dye bleaching an image in a dry physical development photothermographic element containing a silver image, comprising (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of an organic ammonium chloride, bromide or iodide, (c) a thermal solvent, and (d) a bleachable dye, and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° until a dye image is produced.
Claim 36
Dependent Claim
101 words
A process of thermally dye bleaching an image in a dry physical development photothermographic element containing a silver image, comprising (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of an organic ammonium chloride, bromide or iodide, (c) a thermal solvent, and (d) a bleachable dye, and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° until a dye image is produced.
Claim 37
Dependent Claim
18 words
A process as in claim 27 wherein said dye image is thermally transferred to a dye image receiver.
Claim 38
Dependent Claim
19 words
A process as in claim 27 wherein said dye image is thermally transferred to a polyester dye image receiver.
Claim 39
Dependent Claim
90 words
A process as in claim 27 wherein said silver halide complexing agent consists essentially of a compound selected from the group represented by the structures: ##STR97## wherein Z represents the atoms selected from carbon atoms and nitrogen atoms which, together with N, are necessary to complete a 5-membered or 6-membered heterocyclic nucleus, R 1 is alkyl containing 1 to 15 carbon atoms or aryl containing 6 to 10 carbon atoms, R 2 , R 3 , R 4 and R 5 are, individually, alkyl containing 1 to 4 carbon atoms.
Claim 40
Dependent Claim
16 words
A process as in claim 27 wherein said complexing agent consists essentially of a pyridinium bromide.
Claim 41
Dependent Claim
108 words
A process of thermally dye bleaching an image in a dry physical development photothermographic silver halide element comprising, in the absence of a silver-dye bleach catalyst, (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR98## (c) a thermal solvent and (d) a bleachable indophenol dye represented by the formula: ##STR99## and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° C. until a dye image is produced.
Claim 42
Dependent Claim
108 words
A process of thermally dye bleaching an image in a dry physical development photothermographic silver halide element comprising, in the absence of a silver-dye bleach catalyst, (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR98## (c) a thermal solvent and (d) a bleachable indophenol dye represented by the formula: ##STR99## and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° C. until a dye image is produced.
Claim 43
Dependent Claim
114 words
A process of thermally dye bleaching an image in a dry physical development photothermographic silver halide element comprising, in the absence of a silver-dye bleach catalyst, (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR100## (c) a thermal solvent and (d) a bleachable azoaniline dye represented by the formula: ##STR101## and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° C. until a dye image is produced.
Claim 44
Dependent Claim
114 words
A process of thermally dye bleaching an image in a dry physical development photothermographic silver halide element comprising, in the absence of a silver-dye bleach catalyst, (I) contacting said image with a dry activator element comprising a support having thereon at least one layer comprising (a) a hydrophobic, polymeric binder, (b) a silver halide complexing concentration of a silver halide complexing agent consisting essentially of a compound represented by the formula: ##STR100## (c) a thermal solvent and (d) a bleachable azoaniline dye represented by the formula: ##STR101## and then (II) heating the resulting laminate to a temperature within the range of about 90° C. to about 210° C. until a dye image is produced.
Claim 45
Dependent Claim
28 words
In a dry, thermal silver dye-bleach imaging process, the novel step compising complexing silver by means of an organic ammonium chloride, bromide or iodide silver halide complexing agent.
Claim 46
Dependent Claim
28 words
In a dry, thermal silver dye-bleach imaging process, the novel step compising complexing silver by means of an organic ammonium chloride, bromide or iodide silver halide complexing agent.
Claim 47
Dependent Claim
90 words
A process as in claim 34 wherein said silver halide complexing agent consists essentially of a compound selected from the group represented by the structures ##STR102## wherein Z represents the atoms selected from carbon atoms and nitrogen atoms which, together with N, are necessary to complete a 5-membered or 6-membered heterocyclic nucleus, R 1 is alkyl containing 1 to 15 carbon atoms or aryl containing 6 to 10 carbon atoms, R 2 , R 3 , R 4 and R 5 are, individually, alkyl containing 1 to 4 carbon atoms.
Claim 48
Dependent Claim
17 words
A process as in claim 34 wherein said silver halide complexing agent consists esentially of pyridinium bromide.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |