US4128557A
Expired / Lapsed
US
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Silver salts of 1,2,4-mercaptotriazole derivatives
Assignee: Eastman Kodak Co
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Filing: 1977-11-03
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Granted: 1978-12-05
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Expires: 1997-11-03
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
2026-10-29 02:50
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: 17
Claim 1
Independent Claim
53 words
The silver salt of a 1,2,4-mercaptotriazole derivative represented by the formula: ##STR18## wherein Y is unsubstituted aryl having 6 to 12 carbon atoms or aryl having 6 to 12 carbon atoms and substituted with methoxy, cyano, nitro or chloro; n is 0 to 2; and Z is hydrogen, hydroxyl or --NH 2 .
Claim 2
Dependent Claim
53 words
The silver salt of a 1,2,4-mercaptotriazole derivative represented by the formula: ##STR18## wherein Y is unsubstituted aryl having 6 to 12 carbon atoms or aryl having 6 to 12 carbon atoms and substituted with methoxy, cyano, nitro or chloro; n is 0 to 2; and Z is hydrogen, hydroxyl or --NH 2 .
Claim 3
Dependent Claim
23 words
The silver salt as in claim 1 having a molar ratio of ligand to silver ion within the range of 0.5 to 3.0.
Claim 4
Dependent Claim
28 words
The silver salt of a 1,2,4-mercaptotriazole derivative represented by the formula: ##STR19## wherein Y is phenyl, naphthyl, methoxyphenyl, cyanophenyl, nitrophenyl or chlorophenyl; and, n is 0 to 2.
Claim 5
Dependent Claim
28 words
The silver salt of a 1,2,4-mercaptotriazole derivative represented by the formula: ##STR19## wherein Y is phenyl, naphthyl, methoxyphenyl, cyanophenyl, nitrophenyl or chlorophenyl; and, n is 0 to 2.
Claim 6
Dependent Claim
5 words
The silver salt of 3-amino-5-benzylthio-1,2,4-triazole.
Claim 7
Dependent Claim
5 words
The silver salt of 3-amino-5-benzylthio-1,2,4-triazole.
Claim 8
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-methoxy) benzylthio-1H-1,2,4-triazole.
Claim 9
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-methoxy) benzylthio-1H-1,2,4-triazole.
Claim 10
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-cyano) benzylthio-1H-1,2,4-triazole.
Claim 11
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-cyano) benzylthio-1H-1,2,4-triazole.
Claim 12
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-nitro) benzylthio-1H-1,2,4-triazole.
Claim 13
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-nitro) benzylthio-1H-1,2,4-triazole.
Claim 14
Dependent Claim
5 words
The silver salt of 5-benzylthio-1,2,4-triazole.
Claim 15
Dependent Claim
5 words
The silver salt of 5-benzylthio-1,2,4-triazole.
Claim 16
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-chloro) benzylthio-1H-1,2,4-triazole.
Claim 17
Dependent Claim
6 words
The silver salt of 3-amino-5-(p-chloro) benzylthio-1H-1,2,4-triazole.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |