US4680254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsions and photographic elements containing silver halide grains having hexoctamedral crystal faces
Assignee: Eastman Kodak Co
•
Filing: 1986-07-03
•
Granted: 1987-07-14
•
Expires: 2006-07-03
Abstract
Abstract Silver halide photographic emulsions are disclosed comprised of radiation sensitive silver halide grains of a cubic crystal lattice structure comprised of hexoctahedral crystal faces.
Inventors
- 👤 Joe E. Maskasky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
23 words
A silver halide photographic emulsion comprised of radiation sensitive silver halide grains of a cubic crystal lattice structure comprised of hexoctahedral crystal faces.
Claim 2
Dependent Claim
23 words
A silver halide photographic emulsion comprised of radiation sensitive silver halide grains of a cubic crystal lattice structure comprised of hexoctahedral crystal faces.
Claim 3
Dependent Claim
23 words
A silver halide photographic emulsion according to claim 1 wherein said silver halide grains comprised of hexoctahedral crystal faces are silver bromide grains.
Claim 4
Dependent Claim
23 words
A silver halide photographic emulsion according to claim 1 wherein said silver halide grains comprised of hexoctahedral crystal faces are silver chloride grains.
Claim 5
Dependent Claim
41 words
A silver halide photographic emulsion according to claim 1 wherein said silver halide grains comprised of hexoctahedral crystal faces contain at least one of bromide and chloride ions and optionally contain a minor proportion of iodide ions based on total silver.
Claim 6
Dependent Claim
27 words
A silver halide photographic emulsion according to claim 1 wherein said silver halide grains are additionally comprised of at least one of cubic and octahedral crystal faces.
Claim 7
Dependent Claim
17 words
A silver halide photographic emulsion according claim 1 wherein said silver halide grains are regular hexoctahedral grains.
Claim 8
Dependent Claim
21 words
A silver halide photographic emulsion according to claim 1 wherein a grain growth modifier is adsorbed to said hexoctahedral crystal faces.
Claim 9
Dependent Claim
46 words
A silver halide photographic emulsion according to claim 1 wherein said hexoctahedral crystal faces satisfy the Miller index assignment {hkl, wherein h, k, and l are integers greater than 0, h is greater than k, k is greater than l, and h is 5 or less.
Claim 10
Dependent Claim
21 words
A silver halide photographic emulsion according to claim 8 wherein said hexoctahedral crystal faces exhibit a {321} or {521} Miller index.
Claim 11
Dependent Claim
33 words
A silver halide photographic emulsion according to claim 9 wherein a grain growth modifier is present in said emulsion chosen from the class consisting of 6-nitrobenzimidazole, 5-nitro-o-phenyleneguanidine nitrate, 5-carbethoxy-4-hydroxy-1,3,3a,7-tetraazaindene, and 3-carboxymethyl-5-{[3-(3-sulfopropyl)-2-thiazolidinylidene]ethylidene}rhodanine, sodium salt.
Claim 12
Dependent Claim
10 words
A photographic element containing an emulsion according to claim 1.
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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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |