Patent US4677052A successfully refreshed from Google Patents.
US4677052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver salt diffusion transfer photographic material comprising fine and coarse grain silver halide
Assignee: Fujifilm Holdings Corp
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Filing: 1986-11-14
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Granted: 1987-06-30
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Expires: 2006-11-14
Abstract
Abstract A silver salt diffusion transfer photographic material is described, having a silver halide emulsion layer comprising silver halide grains wherein at least 80 percent of the total number of said silver halide grains are accounted for by coarse silver halide grains larger than about 0.8 mu m in diameter and fine silver halide grains of from about 0.1 mu m to about 0.4 mu m in diameter, and said fine silver halide grains constitute from 0.1 to 5 percent of the total weight of silver halide grains and from 10 to 90 percent of the total number of silver halide grains.
Inventors
- 👤 Noriyuki Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03C2001/03564
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
A silver salt diffusion transfer photographic material having a silver halide emulsion layer comprising silver halide grains wherein at least 80 percent of the total number of said silver halide grains are accounted for by coarse silver halide grains larger than about 0.8 μm in diameter and fine silver halide grains of from about 0.1 μm to about 0.4 μm in diameter, and said fine silver halide grains constitute from 0.1 to 5 percent of the total weight of silver halide grains and from 10 to 90 percent of the total number of silver halide grains.
Claim 2
Dependent Claim
96 words
A silver salt diffusion transfer photographic material having a silver halide emulsion layer comprising silver halide grains wherein at least 80 percent of the total number of said silver halide grains are accounted for by coarse silver halide grains larger than about 0.8 μm in diameter and fine silver halide grains of from about 0.1 μm to about 0.4 μm in diameter, and said fine silver halide grains constitute from 0.1 to 5 percent of the total weight of silver halide grains and from 10 to 90 percent of the total number of silver halide grains.
Claim 3
Dependent Claim
31 words
A silver salt diffusion transfer photographic material as in claim 1, wherein said fine silver halide grains constitute from 20 to 80 percent of the total number of silver halide grains.
Claim 4
Dependent Claim
31 words
A silver salt diffusion transfer photographic material as in claim 1, wherein said fine silver halide grains constitute from 20 to 60 percent of the total number of silver halide grains.
Claim 5
Dependent Claim
28 words
A silver salt diffusion transfer photographic material as in claim 2, wherein said coarse silver halide grains have a diameter of from about 0.8 to about 3.0 μm.
Claim 6
Dependent Claim
31 words
A silver salt diffusion transfer photographic material as in claim 1, wherein said coarse silver halide grains constitute from 80 to 20 percent of the total number of silver halide grains.
Claim 7
Dependent Claim
31 words
A silver salt diffusion transfer photographic material as in claim 5, wherein said coarse silver halide grains constitute from 80 to 40 percent of the total number of silver halide grains.
Claim 8
Dependent Claim
28 words
A silver salt diffusion transfer photographic material as in claim 3, wherein said coarse silver halide grains have a diameter of from about 0.8 to about 3.0 μm.
Claim 9
Dependent Claim
45 words
A silver salt diffusion transfer photographic material as in claim 1, wherein said fine silver halide grains constitute from 0.3 to 3 percent of the total weight of silver halide grains and from 10 to 60 percent of the total number of silver halide grains.
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) | 1990-06-29 | 1990-12-29 | 1991-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-29 | 1994-12-29 | 1995-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-29 | 1998-12-29 | 1999-06-30 | $7700.00 | Window Closed / Lapsed |