Patent US4448878A successfully refreshed from Google Patents.
US4448878A
Expired / Lapsed
US
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Silver halide photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1982-11-12
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Granted: 1984-05-15
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Expires: 2002-11-12
Abstract
Abstract A silver halide photographic light-sensitive material is disclosed. The material contains at least one member of the compounds represented by the general formula: ##STR1## (wherein the symbols are the same as described in the appended claims). In this silver halide photographic light-sensitive material, variations in photographic performance are prevented during the storage thereof and, further, the occurrence of fog is prevented without causing a reduction in sensitivity.
Inventors
- 👤 Kiyohiko Yamamuro
- 👤 Shigeo Hirano
- 👤 Yasuo Iwasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:57
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
A silver halide photographic light-sensitive material, comprising: a support base; a silver halide emulsion layer positioned on the support base; and a compound represented by the general formula (I): ##STR11## wherein M is hydrogen, an alkali metal atom, or a quaternary ammonium group, and R 1 and R 2 are each hydrogen, a substituted or unsubstituted aliphatic group, or a substituted or unsubstituted aromatic group, and may be the same or different and may combine together to form a ring.
Claim 2
Dependent Claim
80 words
A silver halide photographic light-sensitive material, comprising: a support base; a silver halide emulsion layer positioned on the support base; and a compound represented by the general formula (I): ##STR11## wherein M is hydrogen, an alkali metal atom, or a quaternary ammonium group, and R 1 and R 2 are each hydrogen, a substituted or unsubstituted aliphatic group, or a substituted or unsubstituted aromatic group, and may be the same or different and may combine together to form a ring.
Claim 3
Dependent Claim
34 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the material is an internal color light-sensitive material comprised of a multilayer construction which includes a plurality of silver halide emulsion layers.
Claim 4
Dependent Claim
20 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the material is a reversal color light-sensitive material.
Claim 5
Dependent Claim
20 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the material is a negative color light-sensitive material.
Claim 6
Dependent Claim
50 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the material has a multilayer construction and includes a colloid silver antihalation layer, an intermediate layer, a red-sensitive layer, an intermediate layer, a green-sensitive layer, a colloid silver yellow filter layer, a blue-sensitive layer, and a protective layer.
Claim 7
Dependent Claim
29 words
A silver halide photographic light-sensitive material as claimed in claim 5, wherein the red-sensitive, green-sensitive and blue-sensitive layers are comprised of a low sensitivity and a high sensitivity layer.
Claim 8
Dependent Claim
26 words
A silver halide photographic light-sensitive material as claimed in claim 6, wherein the compound of general formula (I) is present within the colloid silver antihalation layer.
Claim 9
Dependent Claim
36 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the compound of general formula (I) is present in an amount of from 10 -8 to 10 -2 mol per mol of silver halide.
Claim 10
Dependent Claim
36 words
A silver halide photographic light-sensitive material as claimed in claim 8, wherein the compound of general formula (I) is present in an amount of from 10 -6 to 10 -3 mol per mol of silver halide.
Claim 11
Dependent Claim
27 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein R 1 and R 2 represent aryl groups containing from 6 to 20 carbon atoms.
Claim 12
Dependent Claim
30 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein at least one of R 1 and R 2 represents alkyl groups containing 1 to 6 carbon atoms.
Claim 13
Dependent Claim
38 words
A silver halide photographic light-sensitive material as claimed in claim 11, wherein at least one of R 1 and R 2 represents a methyl group, an ethyl group, an n-propyl group, an n-butyl group or an n-pentyl group.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |