US4207392A
Expired / Lapsed
US
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Heat developable and stabilizable photographic materials and process
Assignee: Eastman Kodak Co
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Filing: 1978-10-30
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Granted: 1980-06-10
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Expires: 1998-10-30
Abstract
Abstract An activator-stabilizer precursor which comprises a certain acylhydrazine which releases a base moiety upon being heated to a temperature above about 130° C. provides improved heat developable and heat stabilizable photographic materials comprising, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of the described activator-stabilizer precursor having an acid portion and a base portion. The heat developable and heat stabilizable photographic element provides essential freedom from visual crystal formation in the processed photographic element. After imagewise exposure, a developed and stabilized image can be produced in the photographic element by heating the element to processing temperature.
Inventors
- 👤 Daniel D. Shiao
- 👤 Lawrence R. Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/165
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
155 words
In a heat developable and heat stabilizable photographic element comprising a support having thereon, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR13## R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR14## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C. and provides essential freedom from visible crystal formation in the processed photographic element.
Claim 2
Dependent Claim
155 words
In a heat developable and heat stabilizable photographic element comprising a support having thereon, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR13## R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR14## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C. and provides essential freedom from visible crystal formation in the processed photographic element.
Claim 3
Dependent Claim
146 words
In a heat developable and heat stabilizable composition comprising, in binder, (a) photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR15## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR16## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is allyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C. and provides essential freedom from visible crystal formation in the processed photographic composition.
Claim 4
Dependent Claim
146 words
In a heat developable and heat stabilizable composition comprising, in binder, (a) photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR15## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR16## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is allyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C. and provides essential freedom from visible crystal formation in the processed photographic composition.
Claim 5
Dependent Claim
120 words
In a thermosensitive photographic processing composition comprising (a) a silver halide developing agent and (b) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR17## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR18## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C.
Claim 6
Dependent Claim
120 words
In a thermosensitive photographic processing composition comprising (a) a silver halide developing agent and (b) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of an acylhydrazine represented by the structure: ##STR17## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR18## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C.
Claim 7
Dependent Claim
156 words
A process of developing and stabilizing an image in an exposed photographic element comprising a support having thereon, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor consisting essentially of an acylhydrazine represented by the structure: ##STR19## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR20## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C.; comprising heating said element to a temperature within the range of 130° C. to 200° C. until said image is developed and stabilized.
Claim 8
Dependent Claim
156 words
A process of developing and stabilizing an image in an exposed photographic element comprising a support having thereon, in binder, and in reactive association, (a) a photosensitive silver salt, (b) a photosensitive silver salt developing agent, and (c) a stabilizing concentration of an activator-stabilizer precursor consisting essentially of an acylhydrazine represented by the structure: ##STR19## wherein R 1 is hydrogen or alkyl containing 1 to 3 carbon atoms; R 2 is --CO--R 4 or --SO 2 --R 4 ; ##STR20## Z is hydrogen or an electron withdrawing group; m is 1 to 4; when Z is hydrogen, m is 4; R 4 is alkyl containing 1 to 3 carbon atoms or hydroxyalkyl containing 1 to 4 carbon atoms which releases a base moiety upon being heated to a temperature above about 130° C.; comprising heating said element to a temperature within the range of 130° C. to 200° C. until said image is developed and stabilized.
Claim 9
Dependent Claim
19 words
A heat developable and heat stabilizable photographic element as in claim 1 wherein said acylhydrazine consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 10
Dependent Claim
19 words
A heat developable and heat stabilizable photographic element as in claim 1 wherein said acylhydrazine consists essentially of 1-o-carboxybenzoyl-2-(4-hydroxybutyryl)hydrazine.
Claim 11
Dependent Claim
19 words
A heat developable and heat stabilizable photographic element as in claim 1 wherein said acylhydrazine consists essentially of 1-(o-carboxybenzoyl)-2-acetyl-2-methylhydrazine.
Claim 12
Dependent Claim
23 words
A heat developable and heat stabilizable photographic element as in claim 1 wherein the photosensitive silver salt consists essentially of photographic silver halide.
Claim 13
Dependent Claim
36 words
A heat developable and heat stabilizable photographic element as in claim 1 wherein said stabilizing concentration is within the range of 0.2 to 4 moles of said activator-stabilizer precursor per mole of said photosensitive silver salt.
Claim 14
Dependent Claim
60 words
In a heat developable and heat stabilizable photographic element comprising a support having thereon, in a gelatino binder, and in reactive association, (a) photographic silver halide, (b) a 3-pyrazolidone silver halide developing agent, and a stabilizing concentration of (c) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 15
Dependent Claim
60 words
In a heat developable and heat stabilizable photographic element comprising a support having thereon, in a gelatino binder, and in reactive association, (a) photographic silver halide, (b) a 3-pyrazolidone silver halide developing agent, and a stabilizing concentration of (c) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 16
Dependent Claim
57 words
A heat developable and heat stabilizable photographic element comprising a support having thereon, in a gelatino binder, and in reactive association, (a) photographic silver halide, (b) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, and a stabilizing concentration of a combination of activator-stabilizer precursors consisting essentially of (c) 1,3-bis(2-amino-2-thiazolinyl)propane, (d) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl area, and (e) 1,1-carbonylbis[2-(o-carboxybenozyl)hydrazine].
Claim 17
Dependent Claim
57 words
A heat developable and heat stabilizable photographic element comprising a support having thereon, in a gelatino binder, and in reactive association, (a) photographic silver halide, (b) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone, and a stabilizing concentration of a combination of activator-stabilizer precursors consisting essentially of (c) 1,3-bis(2-amino-2-thiazolinyl)propane, (d) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl area, and (e) 1,1-carbonylbis[2-(o-carboxybenozyl)hydrazine].
Claim 18
Dependent Claim
19 words
A heat developable and heat stabilizable photographic composition as in claim 2 wherein said acylhydrazine consists essentially of 1,1-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 19
Dependent Claim
19 words
A heat developable and heat stabilizable photographic composition as in claim 2 wherein said acylhydrazine consists essentially of 1-o-carboxybenzoyl-2(4-hydroxybutyryl)hydrazine.
Claim 20
Dependent Claim
19 words
A heat developable and heat stabilizable photographic composition as in claim 2 wherein said acylhydrazine consists essentially of 1-(o-carboxybenzoyl)-2-acetyl-2-methylhydrazine.
Claim 21
Dependent Claim
23 words
A heat developable and heat stabilizable photographic composition as in claim 2 wherein said photographic silver salt consists essentially of photographic silver halide.
Claim 22
Dependent Claim
36 words
A heat developable and heat stabilizable photograhic composition as in claim 2 wherein said stabilizing concentration is within the range of 0.2 to 4 moles of said activator-stabilizer precursor per mole of said photographic silver salt.
Claim 23
Dependent Claim
52 words
In a heat developable and heat stabilizable photographic composition comprising, in a gelatino binder, (a) photographic silver halide, (b) a 3-pyrazolidone silver halide developing agent, and a stabilizing concentration of (c) an activator-stabilizeer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 24
Dependent Claim
52 words
In a heat developable and heat stabilizable photographic composition comprising, in a gelatino binder, (a) photographic silver halide, (b) a 3-pyrazolidone silver halide developing agent, and a stabilizing concentration of (c) an activator-stabilizeer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 25
Dependent Claim
49 words
A heat developable and heat stabilizable photographic composition comprising, in a gelatino binder, (a) photographic silver halide, (b) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and a stabilizing concentration of a combination of activator-stabilizer precursors consisting essentially of (c) 1,3-bis(2-amino-2-thiazolinyl)propane, (d) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl urea, and (e) 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 26
Dependent Claim
49 words
A heat developable and heat stabilizable photographic composition comprising, in a gelatino binder, (a) photographic silver halide, (b) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and a stabilizing concentration of a combination of activator-stabilizer precursors consisting essentially of (c) 1,3-bis(2-amino-2-thiazolinyl)propane, (d) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl urea, and (e) 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 27
Dependent Claim
45 words
In a thermosensitive photographic processing composition comprising (a) a silver halide developing agent consisting essentially of a 3-pyrazolidone silver halide developing agent and (b) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 28
Dependent Claim
45 words
In a thermosensitive photographic processing composition comprising (a) a silver halide developing agent consisting essentially of a 3-pyrazolidone silver halide developing agent and (b) an activator-stabilizer precursor having an acid portion and a base portion, the improvement wherein said activator-stabilizer precursor consists essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 29
Dependent Claim
29 words
A thermosensitive photographic processing composition comprising, in a gelatino binder, (a) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and (b) an activator-stabilizer precursor consisting essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 30
Dependent Claim
29 words
A thermosensitive photographic processing composition comprising, in a gelatino binder, (a) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and (b) an activator-stabilizer precursor consisting essentially of 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 31
Dependent Claim
38 words
A thermosensitive photographic processing composition comprising, in a gelatino binder, (a) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and a combination of activator-stabilizer precursors consisting essentially of (b) 1,3-bis(2-amino-2-thiazolinyl)propane, (c) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl urea, and (d) 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 32
Dependent Claim
38 words
A thermosensitive photographic processing composition comprising, in a gelatino binder, (a) a silver halide developing agent consisting essentially of 4-hydroxymethyl-4-methyl-1-phenyl-3-pyrazolidone and a combination of activator-stabilizer precursors consisting essentially of (b) 1,3-bis(2-amino-2-thiazolinyl)propane, (c) 1,3-bis-2S-(N,N'-ethyleneisothiourea) ethyl urea, and (d) 1,1'-carbonylbis[2-(o-carboxybenzoyl)hydrazine].
Claim 33
Dependent Claim
41 words
A process of developing and stabilizing an image in an exposed photographic element as defined in claim 10 comprisiing heating said element to a temperature within the range of 130° C. to 200° C. until said image is developed and stabilized.
Claim 34
Dependent Claim
41 words
A process of developing and stabilizing an image in an exposed photographic element as defined in claim 11 comprising heating said element to a temperature within the range of 130° C. to 200° C. until said image is developed and stabilized.
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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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |