US4350758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsion containing copper halide host crystals
Assignee: Konica Minolta Inc
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Filing: 1980-11-03
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Granted: 1982-09-21
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Expires: 2000-11-03
Abstract
Abstract A photographic emulsion containing composite crystals of (a) silver halide and (b) copper halide or a solid solution crystal of copper halide and silver halide is found to be sufficiently photosensitive and developable. In such a photographic emulsion, the amount of silver used can significantly be decreased.
Inventors
- 👤 Takeo Koitabashi
- 👤 Syozi Matsuzaka
- 👤 Toshifumi Iijima
- 👤 Tetsuya Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:24
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C2001/03552
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A photographic gelatin silver halide emulsion comprising a composite crystal consisting essentially of (A) (i) a solid solution crystal of a copper halide and a silver halide or (ii) a copper halide, as a host crystal having a mean granular diameter of at least 0.05μ, and (B) a silver halide which is epitaxially junctioned onto said host crystal.
Claim 2
Dependent Claim
58 words
A photographic gelatin silver halide emulsion comprising a composite crystal consisting essentially of (A) (i) a solid solution crystal of a copper halide and a silver halide or (ii) a copper halide, as a host crystal having a mean granular diameter of at least 0.05μ, and (B) a silver halide which is epitaxially junctioned onto said host crystal.
Claim 3
Dependent Claim
35 words
The photographic gelatin silver halide emulsion of claim 1 wherein said host crystal is a solid solution crystal containing not less than 1 mol % of copper halide based on the total solid solution crystal.
Claim 4
Dependent Claim
32 words
The photographic gelatin silver halide emulsion of claim 1 or 2 wherein said host crystal contains a copper halide selected from the group consisting of copper iodide, copper bromide and copper chloride.
Claim 5
Dependent Claim
35 words
The photographic gelatin silver halide emulsion of claim 1 or 2 wherein said epitaxially junctioned silver halide is selected from the group consisting of silver chloride, silver bromide, silver chlorobromide, silver iodobromide and silver chloroiodobromide.
Claim 6
Dependent Claim
33 words
The photographic gelatin silver halide emulsion of claim 4 wherein said epitaxially junctioned silver halide is selected from the group consisting of silver chloride, silver bromide, silver chlorobromide, silver iodobromide and silver chloroiodobromide.
Claim 7
Dependent Claim
17 words
The photographic gelatin silver halide emulsion of claim 3 wherein said host crystal is a copper halide.
Claim 8
Dependent Claim
26 words
The photographic gelatin silver halide emulsion of claim 3 wherein said host crystal is a solid solution crystal of a copper halide and a silver halide.
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) | 1985-09-20 | 1986-03-22 | 1986-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-20 | 1990-03-22 | 1990-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-20 | 1994-03-22 | 1994-09-21 | $7700.00 | Window Closed / Lapsed |