US3859100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material containing a hydroxyazaidene and a carboxyl substituted 1,2-dithiolane as stabilizing combination
Assignee: Fujifilm Holdings Corp
•
Filing: 1973-03-23
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Granted: 1975-01-07
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Expires: 1993-03-23
Abstract
Abstract A silver halide emulsion layer in a photographic material which contains at least one triazaindene, tetrazaindene or a pentazaindene having at least one hydroxy group and at least one compound having a 1,2-dithiolane or a 1,2-dithiane ring exhibits lower fogging but substantially no reduction in desirable photographic characteristics.
Inventors
- 👤 Susumu Kondo
- 👤 Tadao Sakai
- 👤 Reiichi Ohi
- 👤 Mitsunori Sugiyama
- 👤 Mitsuo Numata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
51 words
A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT HAVING THEREON A SILVER HALIDE EMULSION LAYER CONTAINING (1) AT LEAST ONE OF A TRIAZAINDENE, A TETRAZAINDENE OR A PENTAZAINDENE HAVING AT LEAST ONE HYDROXY GROUP AND (2) AT LEAST OF A COMPOUND HAVING A 1,2-DITHIOLANE RING OR A 1,2-DITHIANE RING REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
51 words
A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT HAVING THEREON A SILVER HALIDE EMULSION LAYER CONTAINING (1) AT LEAST ONE OF A TRIAZAINDENE, A TETRAZAINDENE OR A PENTAZAINDENE HAVING AT LEAST ONE HYDROXY GROUP AND (2) AT LEAST OF A COMPOUND HAVING A 1,2-DITHIOLANE RING OR A 1,2-DITHIANE RING REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
43 words
A photographic material as described in claim 1 wherein said silver halide emulsion is sensitized by at least one chemical sensitizing agent from the group: a sulfur sensitizing agent, a noble metal sensitizing agent, a reduction sensitizing agent or a selenium sensitizing agent.
Claim 4
Dependent Claim
69 words
A photographic material as described in claim 1 where the total amount of the (1) at least one of the triazaindene, tetraazaindene and pentazaindene is about 0.005 to about 50 g and the (2) total amount of the at least one of a compound having a 1,2-dithiolane or a 1,2-dithiane ring is about 0.0005 g to 5 g, per 1 mol of silver halide in the silver halide emulsion.
Claim 5
Dependent Claim
43 words
A photographic material as described in claim 3 where the total amount of (1) is about 0.05 to 5 g and the total amount of (2) is about 0.0005 to 5 g, per 1 mol of silver halide in the silver halide emulsion.
Claim 6
Dependent Claim
72 words
A photographic material as described in claim 1 where in the general formula X is an alkylene group from the series methylene to decylene, when R is an carboxylic acid ester the ester is with a C1 - C12 alkyl group or a phenyl group and when R is a carboxylic acid amide it is an amide per se or substituted with a C1 - C12 alkyl group or a phEnyl group.
Claim 7
Dependent Claim
49 words
A photographic material as described in claim 1 where the triazaindene, tetraazaindene or pentazaindene is substituted with a C1 - C17 alkyl, aralkyl, aryl, C1 - C18 alkoxy, carboxyl, C1 -C18 alkoxycarbonyl, aminocarbonyl, cyano or a group forming a hydrocarbon ring with adjacent carbon atoms in the azaindene ring.
Claim 8
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 9
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 10
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 11
Dependent Claim
12 words
A photographic material as described in claim 1 where said azaindene is
Claim 12
Dependent Claim
12 words
A photographic material as described in claim 1 where said azaindene is
Claim 13
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 14
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 15
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
Claim 16
Dependent Claim
12 words
A photographic material as described in claim 1 where said compound is
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |