US3650759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsion containing 1.2-glycol as sensitizer and antifoggant
Assignee: Fujifilm Holdings Corp
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Filing: 1969-07-09
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Granted: 1972-03-21
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Expires: 1989-07-09
Abstract
Abstract A photographic silver halide light-sensitive emulsion is enhanced in sensitivity without an attendant increase in fog by addition to the silver halide emulsion of a 1,2-glycol of the general formula WHEREIN R1, R2 and R3 represent a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxyalkyl group, an aryloxyalkyl group, or an allyloxyalkyl group.
Inventors
- 👤 Minoru Sonoda
- 👤 Nobuo Yammamoto
- 👤 Akikazu Mikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/34
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
31 words
The silver halide photographic emulsion as claimed in claim 1 wherein said compound is selected from the group consisting of 2, 3-butanediol, 1,2-butanediol, pinacol, 1,2-hexanediol, 1-phenyl-1,2-ethanediol, 3-m-octyl-oxy-1,2-propanediol, 3-aryloxy-1,2-propanediol, 3-phenoxy-1,2-propanediol and 3-phenoxy-1,2-propanediol.
Claim 2
Dependent Claim
31 words
The silver halide photographic emulsion as claimed in claim 1 wherein the amount of said compound is in the range of from 2 to 100 g. per mol of silver halide.
Claim 3
Dependent Claim
84 words
A process for preparing silver halide photographic emulsion which comprises adding a compound represented by the general formula wherein R1, R2 and R3 each represents one member selected from the group consisting of a hydrogen atom and an alkyl group, and R4 represents one member selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, an alkoxyalkyl group, an aryloxyalkyl group and an allyloxyalkyl group, to a physically ripened silver halide emulsion added at the beginning of chemical ripening.
Claim 4
Dependent Claim
79 words
A photographic silver halide light-sensitive element comprising a support having coated thereon at least one silver halide emulsion layer containing a compound represented by the general formula wherein R1, R2 and R3 each represents one member selected from the group consisting of a hydrogen atom and an alkyl group, and R4 represents one member selected from the group consisting of a hydrogen atom, an alkyl group, an aryl group, an alkoxyalkyl group, an aryloxyalkyl group and an allyloxyalkyl group.
Claim 5
Dependent Claim
29 words
The photographic silver halide light-sensitive element as claimed in claim 5 wherein said compound is selected from the group consisting of 2,3 butanediol, pinacol, 1,2-hexanediol, 1-phenyl-1,2-ethanediol, 3-m-octyloxy-1,2-propanediol and 3-phenoxy-1,2-propanediol.
Claim 6
Dependent Claim
31 words
The silver halide photographic emulsion as claimed in claim 1, wherein the amount of said compound is in the range of from 5 to 50 g. per mol of silver halide.
Claim 7
Dependent Claim
30 words
The photographic silver halide light-sensitive element as claimed in claim 5, wherein said compound is present in an amount of from 2 to 100 g. per mol of silver halide.
Claim 8
Dependent Claim
30 words
The photographic silver halide light-sensitive element as claimed in claim 8, wherein said compound is present in an amount of from 5 to 50 g. per mol of silver halide.
Claim 9
Dependent Claim
20 words
The silver halide photographic emulsion as claimed in claIm 1, wherein said compound is selected from the group consisting of
Claim 10
Dependent Claim
23 words
The photographic silver halide light-sensitive element as claimed in claim 5, wherein said compound is a member selected from the group consisting of
References Cited (Backward Citations)
US3068102A
Cited
US3294540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |