US3615490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic overcoat comprising a benzotriazole toning agent and a silver salt of 5-mercapto-1-substituted tetrazole
Assignee: Eastman Kodak Co
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Filing: 1968-08-23
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Granted: 1971-10-26
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Expires: 1988-08-23
Abstract
Abstract A photographic element comprising a support, a photographic silver salt layer and a layer comprising a binder, and the combination of triazole cold toning agent and a silver salt of a mercaptoazole, especially in an overcoat layer of such element, provides improved antiplumming and image tone. A combination of a benzotriazole and a silver salt of a 1-phenyl-5-mercaptotetrazole provides very cold tone images after hot glazing without loss of desired sensitometric properties.
Inventors
- 👤 Charles H Gaffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/35; G03C1/355; G03C1/34; G03C1/346; G03C1/494; Y; Y10; Y10S; Y10S430/00; Y10S430/13; Y10S430/162
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
27 words
A photographic element as in claim 1 comprising a support, a photographic silver salt layer and an overcoat layer containing 1,2,3-benzotriazole and a silver salt of 1-phenyl-5-mercaptotetrazole.
Claim 2
Dependent Claim
50 words
A photographic element as in claim 1 wherein said benzotriazole cold toning agent is present in a concentration of about 0.1 to about 10 milligrams per square foot and said silver salt of a 5-mercapto-1-substituted-tetrazole is present in a concentration of about 10 to about 70 milligrams per square foot.
Claim 3
Dependent Claim
49 words
A photographic element as in claim 1 comprising a support, a photographic silver halide layer and a gelatino overcoat layer comprising about 0.1 to about 10 milligrams per square foot of 1, 2,3-benzotriazole and about 10 to about 70 milligrams per square foot of a silver salt of 1-phenyl-5-mercaptotetrazole.
Claim 4
Dependent Claim
13 words
A photographic element as in claim 1 also comprising an incorporated developing agent.
Claim 5
Dependent Claim
11 words
A photographic element as in claim 1 also comprising an antifoggant.
Claim 6
Dependent Claim
27 words
A hydrophilic coating as an overcoat layer for a photographic element comprising a binder, a benzotriazole cold toning agent, and a silver salt of a 5-mercapto-1-substituted-tetrazole compound.
Claim 7
Dependent Claim
18 words
A hydrophilic coating as in claim 7 comprising a binder, 1,2, 3-benzotriazole and a silver salt of 1-phenyl-5-mercaptotetrazole.
Claim 8
Dependent Claim
13 words
A hydrophilic coating as in claim 8 also comprising an incorporated developing agent.
Claim 9
Dependent Claim
63 words
In a photographic process including the steps of developing a latent image in a photographic element; fixing or stabilizing the resulting image; and heat treating the resulting element; the improvement wherein said photographic element comprises a support, a photographic light-sensitive silver salt layer and an overcoat comprising a binder, a. benzotriazole cold toning agent, and b. a silver salt of a 5-mercapto-1-substituted-tetrazole compound.
Claim 10
Dependent Claim
19 words
A process as in claim 10 wherein said heat treating comprises ferrotyping or hot glazing the resulting photographic element.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |