Patent US3950333A successfully refreshed from Google Patents.
US4659646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver salt diffusion transfer photographic material
Assignee: Fujifilm Holdings Corp
•
Filing: 1985-06-18
•
Granted: 1987-04-21
•
Expires: 2005-06-18
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 0.6 μm in diameter and fine silver halide grains smaller than about 0.4 μm in diameter, and said fine silver halide grains constitute at least 10 percent of the total number of silver halide grains.
Inventors
- 👤 Noriyuki Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:25
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: 7
Claim 1
Independent Claim
113 words
A silver salt diffusion transfer photographic material comprising 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 0.6 μm in diameter and fine silver halide grains of from 0.1 to 0.4 μm in diameter, and said fine silver halide grains constitute at least 10 percent of the total number of silver halide grains, wherein said material includes an image receiving layer made of regenerated cellulose containing a silver precipitating agent and is adapted for processing in the presence of a hydroxyl amine developer and a silver halide solvent.
Claim 2
Dependent Claim
113 words
A silver salt diffusion transfer photographic material comprising 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 0.6 μm in diameter and fine silver halide grains of from 0.1 to 0.4 μm in diameter, and said fine silver halide grains constitute at least 10 percent of the total number of silver halide grains, wherein said material includes an image receiving layer made of regenerated cellulose containing a silver precipitating agent and is adapted for processing in the presence of a hydroxyl amine developer and a silver halide solvent.
Claim 3
Dependent Claim
27 words
A silver salt diffusion transfer photographic material as in claim 1, wherein said coarse silver halide grains have a diameter of from 0.8 to about 3.0 μm.
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 80 percent of the total number of silver halide grains.
Claim 5
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 6
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 7
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 40 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) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |