US5039601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions with silver halide grain groups of different desensitizing agent content
Assignee: Konica Minolta Inc
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Filing: 1990-09-05
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Granted: 1991-08-13
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Expires: 2010-09-05
Abstract
Abstract A silver halide color negative photographic light-sensitive material is disclosed which is improved on stability to fluctuation of processing conditions applied thereon, and has a sufficient wide exposure latitude. The photographic material is also improved on standing stability of silver halide emulsion in the course of manufacturing thereof. The photographic material comprises a support having thereon photographic component layers including at least one silver halide emulsion layer containing at least two groups of silver halide grains each being substantially different in desensitizing agent content from each other.
Inventors
- 👤 Yukio Ohya
- 👤 Syoji Matsuzaka
- 👤 Hirofumi Ohtani
- 👤 Yoshiro Ito
- 👤 Mineko Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:02
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C1/00; G03C1/005; G03C1/035; G03C7/3022; G03C2001/03564
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A process for manufacturing a silver halide emulsion comprising at least two groups of silver halide grains which are substantially different in desensitizing agent content from each other, comprising the steps of: (a) mixing at least two groups of silver halide seed grains, wherein said groups of silver halide seed grains are different from each other in the content of a desensitizing agent contained therein, and then (b) growing said mixed silver halide seed grains so as to make said silver halide emulsion comprising said at least two groups of silver halide grains.
Claim 2
Dependent Claim
93 words
A process for manufacturing a silver halide emulsion comprising at least two groups of silver halide grains which are substantially different in desensitizing agent content from each other, comprising the steps of: (a) mixing at least two groups of silver halide seed grains, wherein said groups of silver halide seed grains are different from each other in the content of a desensitizing agent contained therein, and then (b) growing said mixed silver halide seed grains so as to make said silver halide emulsion comprising said at least two groups of silver halide grains.
Claim 3
Dependent Claim
25 words
The process of claim 1, wherein the desensitizing agent content of the group of silver halide grains having the lowest desensitizing agent content is zero.
Claim 4
Dependent Claim
44 words
The process of claim 1, wherein the desensitizing agent content of the group of silver halide grains having highest desensitizing agent content is not less than 10 times higher than that of the group of silver halide grains having the lowest desensitizing agent content.
Claim 5
Dependent Claim
45 words
The process of claim 3, wherein the desensitizing agent content of the group of silver halide grains having highest desensitizing agent content is not less than 10 3 times higher than that of the group of silver halide grains having the lowest desensitizing agent content.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein said desensitizing agent is a metal ion.
Claim 7
Dependent Claim
33 words
The process of claim 5, wherein said metal ion is contained in said silver halide grains in a content of from 10 -17 mol to 10 -2 mol per mol of silver halide.
Claim 8
Dependent Claim
30 words
The process of claim 5, wherein said desensitizing agent is selected from the group consisting of ions of iridium, cadmium, lead, rhodium, zinc, iron, thalium, bismuth, gold, osmium and paladium.
Claim 9
Dependent Claim
12 words
The process of claim 7, wherein said desensitizing agent is rhodium ion.
Claim 10
Dependent Claim
33 words
The process of claim 8, wherein said rhodium ion is contained in said silver halide grains in a content of from 10 -14 mol to 10 -2 mol per mol of silver halide.
References Cited (Backward Citations)
US3888676A
Cited
FR2382028A1
Cited
US4301242A
Cited
EP0087880A2
Cited
US4818659A
Cited
EP0269056A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |