US4835093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally doped silver halide emulsions
Assignee: Eastman Kodak Co
•
Filing: 1988-04-08
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Granted: 1989-05-30
•
Expires: 2008-04-08
Abstract
Abstract A photographic silver halide emulsion is disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure and internally containing rhenium ions.
Inventors
- 👤 Gaile A. Janusonis
- 👤 Ralph W. Jones
- 👤 James R. Buntaine
- 👤 Myra T. Olm
- 👤 Raymond S. Eachus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/015; G03C1/485; G03C1/48515; G03C1/48523
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
24 words
A photographic silver halide emulsion comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing rhenium ions.
Claim 2
Dependent Claim
24 words
A photographic silver halide emulsion comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing rhenium ions.
Claim 3
Dependent Claim
19 words
A photographic emulsion according to claim 1 in which the emulsion is a silver bromide or silver bromoiodide emulsion.
Claim 4
Dependent Claim
16 words
A photographic emulsion according to claim 1 in which the emulsion is a high chloride emulsion.
Claim 5
Dependent Claim
23 words
A photographic emulsion according to claim 1 in which rhenium is present in the emulsion in an amount sufficient to reduce photographic speed.
Claim 6
Dependent Claim
29 words
A photographic emulsion according to claim 1 in which a ligand differing from the halide forming the silver halide grains is incorporated in the grains along with rhenium ions.
Claim 7
Dependent Claim
18 words
A photographic emulsion according to claim 5 in which the incorporated ligand is a halide or aquo ligand.
Claim 8
Dependent Claim
62 words
A photographic emulsion according to claim 1 in which the rhenium ion is introduced into the emulsion in the form of a hexacoordination complex satisfying the formula: [ReL.sub.6 ].sup.k where L is chosen from halide and aquo ligands, with the proviso that no more than two of the ligands are aquo ligands k is the integer zero, -1, -2, -3, or -4.
Claim 9
Dependent Claim
20 words
A photographic emulsion according to claim 7 in which the silver halide grains are silver bromide or silver bromoiodide grains.
Claim 10
Dependent Claim
16 words
A photographic emulsion according to claim 8 in which the halide forming the ligands is chloride.
Claim 11
Dependent Claim
30 words
A photographic emulsion according to claim 9 in which rhenium ion is present in the grains in a concentration of from 10 -8 to 10 -7 mole per silver mole.
Claim 12
Dependent Claim
16 words
A photographic emulsion according to claim 8 in which the halide forming the ligands is bromide.
Claim 13
Dependent Claim
30 words
A photographic emulsion according to claim 11 in which rhenium ion is present in the grains in a concentration of from 10 -7 to 10 -5 mole per silver mole.
Claim 14
Dependent Claim
35 words
A photographic emulsion according to claim 1 in which the silver halide grains are surface fogged and the rhenium ions are present in a concentration sufficient to internally trap free electrons generated by photographic exposure.
Claim 15
Dependent Claim
28 words
A photographic emulsion according to claim 13 in which the rhenium ions are present in a concentration of from 10 -3 to 10 -8 mole per silver mole.
Claim 16
Dependent Claim
28 words
A photographic emulsion according to claim 14 in which the rhenium ions are present in a concentration of from 10 -4 to 10 -6 mole per silver mole.
Claim 17
Dependent Claim
21 words
A photographic emulsion according to claim 13 in which the silver halide grains are reduction and gold fogged at their surfaces.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |