US4266018A
Expired / Lapsed
US
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Silver halide photographic emulsions
Assignee: Fujifilm Holdings Corp
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Filing: 1979-09-25
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Granted: 1981-05-05
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Expires: 1999-09-25
Abstract
Abstract A silver halide photographic emulsion chemically sensitized by a sulfur compound of the formula: ##STR1## wherein R 1 represents a 5-membered or 6-membered heterocyclic ring containing a nitrogen atom; R 2 represents a hydrogen atom, a lower alkyl group, an allyl group, an aryl group, or an aralkyl group; and R 3 has the same definition as R 1 or R 2 ; or R 2 and R 3 may join to form a heterocyclic ring; is disclosed.
Inventors
- 👤 Shoji Ishiguro
- 👤 Tadao Shishido
- 👤 Takeo Sakai
- 👤 Noboru Sasaki
- 👤 Joji Nagaoka
- 👤 Minoru Matsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
163 words
A silver halide photographic emulsion containing the compound represented by the formula: ##STR6## wherein R 1 represents a 5-membered or 6-membered heterocyclic residue containing a nitrogen atom selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring; R 2 represents a hydrogen atom, a lower alkyl group, an allyl group, an aryl group, or an aralkyl group; and R 3 has the same meaning as R 1 or R 2 ; or R 2 and R 3 may combine to form a heterocyclic ring, wherein the amount of said compound is a sensitizing and antifogging amount within the range from 5×10 -6 mol to 1×10 -3 mol per mol of silver halide in the silver halide photographic emulsion.
Claim 2
Dependent Claim
163 words
A silver halide photographic emulsion containing the compound represented by the formula: ##STR6## wherein R 1 represents a 5-membered or 6-membered heterocyclic residue containing a nitrogen atom selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring; R 2 represents a hydrogen atom, a lower alkyl group, an allyl group, an aryl group, or an aralkyl group; and R 3 has the same meaning as R 1 or R 2 ; or R 2 and R 3 may combine to form a heterocyclic ring, wherein the amount of said compound is a sensitizing and antifogging amount within the range from 5×10 -6 mol to 1×10 -3 mol per mol of silver halide in the silver halide photographic emulsion.
Claim 3
Dependent Claim
27 words
The silver halide photographic emulsion of claim 1, wherein said compound is added to the silver halide photographic emulsion at the initiation of chemical ripening of it.
Claim 4
Dependent Claim
24 words
The silver halide photographic emulsion of claim 2, wherein the pAg of the silver halide emulsion upon chemical ripening is about 8.0 to 11.0.
Claim 5
Dependent Claim
18 words
The silver halide photographic emulsion of claim 1, wherein said silver halide is silver bromide or silver iodobromide.
Claim 6
Dependent Claim
75 words
The silver halide photographic emulsion of claim 1, wherein said 5-membered or 6-membered heterocyclic ring represented by R 3 is selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring.
Claim 7
Dependent Claim
49 words
The silver halide photographic emulsion of claim 5, wherein said heterocyclic ring is substituted by an alkyl group, an alkoxy group, an aryl group, a halogen atom, an alkylthio group, an aralkyl group, an amido group, a sulfo group, a carboxy group, an alkoxysulfonyl group or an alkoxycarbonyl group.
Claim 8
Dependent Claim
41 words
The silver halide photographic emulsion of claim 1, wherein said alkyl group represented by R 2 is an alkyl group having 1 to 6 carbon atoms which may be substituted by a hydroxy group, a cyano group or an amino group.
Claim 9
Dependent Claim
30 words
The silver halide photographic emulsion of claim 1, wherein said aryl group represented by R 2 is a phenyl group, a naphthyl group, a p-tolyl group, or a p-chlorophenyl group.
Claim 10
Dependent Claim
38 words
The silver halide photographic emulsion of claim 1, wherein said ring formed by R 2 and R 3 is selected from the group consisting of a morpholine ring, a piperidine ring, a piperazine ring or a pyrrolidine ring.
Claim 11
Dependent Claim
15 words
The silver halide photographic emulsion of claim 1, wherein said emulsion additionally contains an antifoggant.
Claim 12
Dependent Claim
18 words
The silver halide photographic emulsion of claim 1, wherein said emulsion additionally contains a color image forming coupler.
Claim 13
Dependent Claim
79 words
A photographic material comprising a support having coated thereon at least one silver halide photographic emulsion containing a compound represented by the formula: ##STR7## selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring.
Claim 14
Dependent Claim
79 words
A photographic material comprising a support having coated thereon at least one silver halide photographic emulsion containing a compound represented by the formula: ##STR7## selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring.
Claim 15
Dependent Claim
27 words
The silver halide photographic material of claim 12, wherein said compound is added to the siler halide photographic emulsion at the initiation of chemical ripening of it.
Claim 16
Dependent Claim
24 words
The silver halide photographic material of claim 13, wherein the pAg of the silver halide emulsion upon chemical ripening is about 8.0 to 11.0.
Claim 17
Dependent Claim
18 words
The silver halide photographic material of claim 12, wherein said silver halide is silver bromide or silver iodobromide.
Claim 18
Dependent Claim
75 words
The silver halide photographic material of claim 12, wherein said 5-membered or 6-membered heterocyclic ring represented by R 3 is selected from the group consisting of a pyrroline ring, a pyridine ring, a quinoline ring, an indole ring, an oxazole ring, a benzoxazole ring, a naphthoxazole ring, an imidazole ring, a benzimidazole ring, a thiazoline ring, a thiazole ring, a benzothiazole ring, a naphthothiazole ring, a selenazole ring, a benzoselenazole ring and a naphthoselenazole ring.
Claim 19
Dependent Claim
49 words
The silver halide photographic material of claim 12, wherein said heterocyclic ring is substituted by an alkyl group, an alkoxy group, an aryl group, a halogen atom, an alkylthio group, an aralkyl group, an amido group, a sulfo group, a carboxy group, an alkoxysulfonyl group or an alkoxycarbonyl group.
Claim 20
Dependent Claim
41 words
The silver halide photographic material of claim 12, wherein said alkyl group represented by R 2 is an alkyl group having 1 to 6 carbon atoms which may be substituted by a hydroxy group, a cyano group or an amino group.
Claim 21
Dependent Claim
30 words
The silver halide photographic material of claim 12, wherein said aryl group represented by R 2 is a phenyl group, a naphthyl group, a p-tolyl group, or a p-chlorophenyl group.
Claim 22
Dependent Claim
38 words
The silver halide photographic material of claim 12, wherein said ring formed by R 2 and R 3 is selected from the group consisting of a morpholine ring, a piperidine ring, a piperazine ring or a pyrrolidine ring.
Claim 23
Dependent Claim
15 words
The silver halide photographic material of claim 12, wherein said emulsion additionally contains an antifoggant.
Claim 24
Dependent Claim
18 words
The silver halide photographic material of claim 12, wherein said emulsion additionally contains a color image forming coupler.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |