US4514491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive silver halide emulsion
Assignee: Konica Minolta Inc
•
Filing: 1982-05-03
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Granted: 1985-04-30
•
Expires: 2002-05-03
Abstract
Abstract A photosensitive silver halide emulsion comprising photosensitive silver halide grains which essentially consists of monodisperse globular-shaped grains. The grains may be prepared by adding a silver halide solvent to a silver halide emulsion containing monodisperse silver halide grains of regular crystal habit at a time between the complete formation of the monodisperse silver halide grains of regular crystal habit and before commencement of chemical sensitization.
Inventors
- 👤 Takeo Koitabashi
- 👤 Syoji Matsuzaka
- 👤 Yuji Hotta
- 👤 Masatoshi Iwata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C2001/0357
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A photosensitive silver halide emulsion comprising photosensitive silver halide grains which essentially consist of monodisperse globular-shaped grains, wherein the ratio of the standard deviation to the average grain size of said monodisperse globular-shaped grains contained in the emulsion is not more than 0.15.
Claim 2
Dependent Claim
43 words
A photosensitive silver halide emulsion comprising photosensitive silver halide grains which essentially consist of monodisperse globular-shaped grains, wherein the ratio of the standard deviation to the average grain size of said monodisperse globular-shaped grains contained in the emulsion is not more than 0.15.
Claim 3
Dependent Claim
18 words
A photosensitive silver halide emulsion according to claim 1, wherein said silver halide is AgBr, AgBrI or AgClBrI.
Claim 4
Dependent Claim
62 words
A photosensitive silver halide emulsion according to claim 1, wherein said monodisperse globular-shaped grain is prepared by adding a silver halide solvent to a silver halide emulsion containing monodisperse silver halide grains having a regular crystal habit at a time between the completion of formation of the monodisperse silver halide grains having regular crystal habits and before the commencement of chemical sensitization.
Claim 5
Dependent Claim
25 words
A photosensitive silver halide emulsion according to claim 3, wherein said silver halide grains have a regular crystal habit of cubic, octahedron, or tetradecahedron shape.
Claim 6
Dependent Claim
17 words
A photosensitive silver halide emulsion according to claim 1, wherein said ratio is not more than 0.10.
Claim 7
Dependent Claim
27 words
A photosensitive silver halide emulsion according to claim 2, wherein said silver halide is AgBrI, said AgBrI containing AgI in an amount not higher than 10 mol%.
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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) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |