US4769315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide grain and light-sensitive photographic material containing said silver halide grain
Assignee: Konica Minolta Inc
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Filing: 1987-01-27
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Granted: 1988-09-06
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Expires: 2007-01-27
Abstract
Abstract Disclosed are a silver halide grain comprising 8 or 12 concavities on the surface, and a photographical light-sensitive material containing a silver halide grain having 8 to 12 concavities on the surface. According to the present invention, there can be obtained silver halide grains having still higher sensitivity and also improved in the relationship of sensitivity-fog as compared with those of the prior art, and also a light-sensitive silver halide material by use of an emulsion containing said grains.
Inventors
- 👤 Yoshihiko Suda
- 👤 Syoji Matsuzaka
- 👤 Yasuo Tosaka
- 👤 Yukio Ohya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:16
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
13 words
A silver halide grain which has 8 to 12 concavities on the surface.
Claim 2
Dependent Claim
13 words
A silver halide grain which has 8 to 12 concavities on the surface.
Claim 3
Dependent Claim
28 words
The silver halide grain according to claim 1, wherein the silver halide constituting the said grain comprises silver chloride, silver bromide, silver chlorobromide, silver iodobromide or silver chloroiodobromide.
Claim 4
Dependent Claim
27 words
The silver halide grain according to claim 2, wherein said silver iodobromide or said chloroiodobromide contains silver iodide in an amount of 40 mol % or less.
Claim 5
Dependent Claim
45 words
The silver halide grain according to claim 1, wherein said grain is prepared by treating a silver halide grain comprising a normal crystal of the silver halide, under pAg which is higher than the average pAg of the mother liquor during formation of said grain.
Claim 6
Dependent Claim
45 words
The silver halide grain according to claim 4, wherein said grain is prepared by treating a silver halide grain having the (110) face and/or the (nnl) face, under pAg which is higher than the average pAg of the mother liquor during formation of said grain.
Claim 7
Dependent Claim
56 words
The silver halide grain according to claim 5, wherein said treating of said grain is performed under pAg of 9.0 or more in case of silver halide constituting said grain is silver bromide, silver iodobromide or silver chloroiodobromide and under pAg of 7.0 or more in case of silver halide constituting said grain is silver chlorobromide.
Claim 8
Dependent Claim
13 words
The silver halide grain according to claim 1, wherein said grain is mono-dispersed.
Claim 9
Dependent Claim
20 words
The silver halide grain according to claim 1, wherein said grain has an average diameter of 0.1 to 0.3 μm.
Claim 10
Dependent Claim
24 words
The silver halide grain according to claim 1, wherein said treating of said grain is performed at a period before initiation of chemical aging.
Claim 11
Dependent Claim
17 words
A photographical light-sensitive material containing a silver halide grain comprising 8 to 12 concavities on the surface.
Claim 12
Dependent Claim
17 words
A photographical light-sensitive material containing a silver halide grain comprising 8 to 12 concavities on the surface.
Claim 13
Dependent Claim
33 words
The photographical light-sensitive material according to claim 10, wherein said grain is applied to the layer with higher sensitivity when said material has at least two kinds of emulsion layers with different sensitivities.
Claim 14
Dependent Claim
13 words
The silver halide grain of claim 2 having 8 concavities on its surface.
Claim 15
Dependent Claim
13 words
The silver halide grain of claim 2 having 12 concavities on its surface.
Claim 16
Dependent Claim
13 words
The silver halide grain of claim 3 having 8 concavities on its surface.
Claim 17
Dependent Claim
12 words
The silver halide of claim 3 having 12 concavities on its surface.
Claim 18
Dependent Claim
13 words
The silver halide grain of claim 6 having 8 concavities on its surface.
Claim 19
Dependent Claim
12 words
The silver halide of claim 6 having 12 concavities on its surface.
Claim 20
Dependent Claim
13 words
The silver halide grain of claim 8 having 8 concavities on its surface.
Claim 21
Dependent Claim
12 words
The silver halide of claim 8 having 12 concavities on its surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |