US4123274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable imaging materials and process
Assignee: Eastman Kodak Co
•
Filing: 1977-03-16
•
Granted: 1978-10-31
•
Expires: 1997-03-16
Abstract
Abstract A photothermographic material comprising in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of certain 1,2,4-mercaptotriazole derivatives with (ii) a silver halide developing agent, and (c) a polymeric binder, provides developed images without the need for processing solutions or baths. An image can be developed in this material by merely heating the material to moderately elevated temperatures. The silver salts of certain 3-amino-1,2,4-mercaptotriazole derivatives are particularly preferred compounds. Other addenda employed in heat developable photothermographic materials, such as sensitizing dyes, can be employed with the photothermographic materials described.
Inventors
- 👤 Phillip D. Knight
- 👤 Richard A. DEMauriac
- 👤 Patricia A. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
C; C07; C07D; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/14; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49809
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
67 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of a 3-amino-1,2,4-mercaptotriazole represented by the formula: ##STR18## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or --NH 2 ; with (ii) a silver halide developing agent, and a polymeric binder.
Claim 2
Dependent Claim
67 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of a 3-amino-1,2,4-mercaptotriazole represented by the formula: ##STR18## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or --NH 2 ; with (ii) a silver halide developing agent, and a polymeric binder.
Claim 3
Dependent Claim
37 words
A process of developing an image in an exposed photothermographic element as defined in claim 1 comprising heating said element to a temperature within the range of 125° C. to 200° C. until an image is developed.
Claim 4
Dependent Claim
27 words
A process as in claim 2 comprising heating said element to a temperature within the range of 140° C. to 200° C. for 2 to 60 seconds.
Claim 5
Dependent Claim
14 words
A photothermographic element as in claim 1 wherein Y is phenyl, p-methoxyphenyl, or p-chlorophenyl.
Claim 6
Dependent Claim
12 words
A photothermographic element as in claim 1 also comprising a base precursor.
Claim 7
Dependent Claim
18 words
A photothermographic element as in claim 1 also comprising a base precursor consisting essentially of a guanidinium salt.
Claim 8
Dependent Claim
12 words
A photothermographic element as in claim 1 also comprising an image toner.
Claim 9
Dependent Claim
18 words
A photothermographic element as in claim 1 also comprising an image toner consisting essentially of a 1-phenyl-2-tetrazoline-5-thione compound.
Claim 10
Dependent Claim
30 words
A photothermographic element as in claim 1 wherein the silver salt of the 3-amino-1,2,4-mercaptotriazole has a molar ratio of ligand to silver ion within the range of 0.5 to 3.0.
Claim 11
Dependent Claim
36 words
A photothermographic element as in claim 1 comprising, for each mole of photosensitive silver halide, 2.0 to 8.0 moles of said silver salt of 3-amino-1,2,4-mercaptotriazole, and 5.0 to 10.0 moles of said silver halide developing agent.
Claim 12
Dependent Claim
39 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-benzylthio-1,2,4-triazole, and (ii) a phenolic silver halide developing agent, and (c) a polymeric binder.
Claim 13
Dependent Claim
39 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-benzylthio-1,2,4-triazole, and (ii) a phenolic silver halide developing agent, and (c) a polymeric binder.
Claim 14
Dependent Claim
38 words
A process of developing and stabilizing an image in a photothermographic element as defined in claim 11 comprising heating said element to a temperature within the range of 140° C. to 200° C. for 2 to 60 seconds.
Claim 15
Dependent Claim
38 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-methoxy)benzylthio-1H-1,2,4-triazole, and (ii) a silver halide developing agent, and (c) a polymeric binder.
Claim 16
Dependent Claim
38 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-methoxy)benzylthio-1H-1,2,4-triazole, and (ii) a silver halide developing agent, and (c) a polymeric binder.
Claim 17
Dependent Claim
38 words
A process of developing and stabilizing an image in a photothermographic element as defined in claim 13 comprising heating said element to a temperature within the range of 140° C. to 200° C. for 2 to 60 seconds.
Claim 18
Dependent Claim
38 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-chloro)benzylthio-1,2,4-triazole, and (ii) a silver halide developing agent, and (c) a polymeric binder.
Claim 19
Dependent Claim
38 words
A photothermographic element comprising a support having thereon in reactive association (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-chloro)benzylthio-1,2,4-triazole, and (ii) a silver halide developing agent, and (c) a polymeric binder.
Claim 20
Dependent Claim
38 words
A process of developing and stabilizing an image in a photothermographic element as defined in claim 15 comprising heating said element to a temperature within the range of 140° C. to 200° C. for 2 to 60 seconds.
Claim 21
Dependent Claim
59 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of a 3-amino-1,2,4-mercaptotriazole represented by the formula: ##STR19## wherein Y is an aryl group containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or NH 2 ; with (ii) a silver halide developing agent.
Claim 22
Dependent Claim
59 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of a 3-amino-1,2,4-mercaptotriazole represented by the formula: ##STR19## wherein Y is an aryl group containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or NH 2 ; with (ii) a silver halide developing agent.
Claim 23
Dependent Claim
12 words
A photothermographic composition as in claim 17 also comprising a polymeric binder.
Claim 24
Dependent Claim
14 words
A photothermographic composition as in claim 17 wherein Y is phenyl, p-methoxyphenyl, or p-chlorophenyl.
Claim 25
Dependent Claim
12 words
A photothermographic composition as in claim 17 also comprising a base precursor.
Claim 26
Dependent Claim
18 words
A photothermographic composition as in claim 17 also comprising a base precursor consisting essentially of a guanidinium salt.
Claim 27
Dependent Claim
12 words
A photothermographic composition as in claim 17 also comprising an image toner.
Claim 28
Dependent Claim
18 words
A photothermographic composition as in claim 17 also comprising an image toner consisting essentially of a 1-phenyl-2-tetrazoline-5-thione compound.
Claim 29
Dependent Claim
30 words
A photothermographic composition as in claim 17 wherein the silver salt of the 3-amino-1,2,4-mercaptotriazole has a molar ratio of ligand to silver ion within the range of 0.5 to 3.0.
Claim 30
Dependent Claim
37 words
A photothermographic composition as in claim 17 comprising, for each mole of photosensitive silver halide, 2.0 to 8.0 moles of said silver salt of a 3-amino-1,2,4-mercaptotriazole, and 5.0 to 10.0 moles of said silver halide developing agent.
Claim 31
Dependent Claim
28 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-benzylthio-1,2,4-triazole, and (ii) a phenolic silver halide developing agent.
Claim 32
Dependent Claim
28 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-benzylthio-1,2,4-triazole, and (ii) a phenolic silver halide developing agent.
Claim 33
Dependent Claim
12 words
A photothermographic composition as in claim 26 also comprising a gelatino binder.
Claim 34
Dependent Claim
18 words
A photothermographic composition as in claim 26 also comprising a toning agent consisting essentially of a 1-phenyl-2-tetrazoline-5-thione compound.
Claim 35
Dependent Claim
27 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-methoxy)benzylthio-1H-1,2,4-triazole, and (ii) a silver halide developing agent.
Claim 36
Dependent Claim
27 words
A photothermographic composition comprising (a) photosensitive silver halide, and (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-methoxy)benzylthio-1H-1,2,4-triazole, and (ii) a silver halide developing agent.
Claim 37
Dependent Claim
12 words
A photothermographic composition as in claim 29 also comprising a gelatino binder.
Claim 38
Dependent Claim
26 words
A photothermographic composition comprising (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-chloro)benzylthio-1,2,4-triazole, and (ii) a silver halide developing agent.
Claim 39
Dependent Claim
26 words
A photothermographic composition comprising (a) photosensitive silver halide, (b) an image-forming combination comprising (i) a silver salt of 3-amino-5-(p-chloro)benzylthio-1,2,4-triazole, and (ii) a silver halide developing agent.
Claim 40
Dependent Claim
12 words
A photothermographic composition as in claim 31 also comprising a gelatino binder.
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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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |