US4937180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions containing internally modified silver halide grains
Assignee: Eastman Kodak Co
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Filing: 1988-04-08
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Granted: 1990-06-26
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Expires: 2008-04-08
Abstract
Abstract Photographic emulsions are disclosed comprised of radiation sensitive silver bromide grains optionally containing iodide. The grains exhibit a face centered cubic crystal lattice structure and are formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands.
Inventors
- 👤 Alfred P. Marchetti
- 👤 Woodrow G. McDugle
- 👤 Raymond S. Eachus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C1/06; G03C1/08; G03C1/09; G03C1/34
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
43 words
A photographic emulsion comprised of radiation sensitive silver bromide grains optionally containing iodide, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence of a hexacoordination complex of rhenium, ruthenium, osmium, or iridium with at least four cyanide ligands.
Claim 2
Dependent Claim
43 words
A photographic emulsion comprised of radiation sensitive silver bromide grains optionally containing iodide, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence of a hexacoordination complex of rhenium, ruthenium, osmium, or iridium with at least four cyanide ligands.
Claim 3
Dependent Claim
26 words
A photographic emulsion according to claim 1 further characterized in that said grains contain from about 0.1 to 20 mole percent iodide, based on total silver.
Claim 4
Dependent Claim
27 words
A photographic emulsion according to claim 2 further characterized in that said grains contain less from about 1 to 10 mole percent iodide, based on total silver.
Claim 5
Dependent Claim
21 words
A photographic emulsion according to claim 1 further characterized in that silver halide forming said grains consists essentially of silver bromoiodide.
Claim 6
Dependent Claim
21 words
A photographic emulsion according to claim 1 further characterized in that silver halide forming said grains consists essentially of silver bromide.
Claim 7
Dependent Claim
25 words
A photographic emulsion according to claim 1 further characterized in that said silver halide grains exhibit at least one of sulfur and gold surface sensitization.
Claim 8
Dependent Claim
36 words
A photographic emulsion according to claim 1 further characterized in that said rhenium, ruthenium, osmium, or iridium is present in said emulsion in a concentration of from 1×10 -6 to 5×10 -4 mole per silver mole.
Claim 9
Dependent Claim
48 words
A photographic emulsion according to claim 1 further characterized in that said hexacoordination complex satisfies the formula: [M(CN).sub.6-y L.sub.y ].sup.n where M is rhenium, ruthenium, osmium, or iridium, L is a bridging ligand, y is the integer zero, 1, or 2, and n is -2, -3, or -4.
Claim 10
Dependent Claim
16 words
A photographic emulsion according to claim 8 further characterized in that L is a halide ligand.
Claim 11
Dependent Claim
26 words
A photographic emulsion according to claim 1 further characterized in that said grains contain at least one of rhenium, ruthenium, osmium, and iridium and cyanide ligands.
Claim 12
Dependent Claim
20 words
a photographic emulsion according to claim 10 further characterized in that said hexcoordination complex is present in a stabilizing amount.
Claim 13
Dependent Claim
29 words
A photographic emulsion according to claim 11 further characterized in that said complex is present in a concentration of from 10 -5 to 10 -4 mole per silver mole.
Claim 14
Dependent Claim
66 words
A photographic emulsion comprised of radiation sensitive silver bromide grains surface sensitized with sulfur, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence from 1×10 -6 to 5×10 -4 mole per silver mole of a hexacoordination complex of the formula: [M(CN).sub.6-y L.sub.y ].sup.-4 where M is ruthenium or osmium, L is halide, and y is the integer zero, 1, or 2.
Claim 15
Dependent Claim
66 words
A photographic emulsion comprised of radiation sensitive silver bromide grains surface sensitized with sulfur, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence from 1×10 -6 to 5×10 -4 mole per silver mole of a hexacoordination complex of the formula: [M(CN).sub.6-y L.sub.y ].sup.-4 where M is ruthenium or osmium, L is halide, and y is the integer zero, 1, or 2.
Claim 16
Dependent Claim
14 words
A photographic emulsion according to claim 13 further characterized in that y is zero.
Claim 17
Dependent Claim
61 words
A photographic emulsion comprised of radiation sensitive silver bromide grains surface sensitized with sulfur, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence from 1×10 -6 to 5×10 -4 mole per silver mole of a hexacoordination complex of the formula: [Ir(CN).sub.6-y L.sub.y ].sup.-3 where L is halide and y is the integer zero, 1, or 2.
Claim 18
Dependent Claim
61 words
A photographic emulsion comprised of radiation sensitive silver bromide grains surface sensitized with sulfur, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence from 1×10 -6 to 5×10 -4 mole per silver mole of a hexacoordination complex of the formula: [Ir(CN).sub.6-y L.sub.y ].sup.-3 where L is halide and y is the integer zero, 1, or 2.
Claim 19
Dependent Claim
14 words
A photographic emulsion according to claim 15 further characterized in that y is zero.
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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) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |