US4359526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a photosensitive silver halide element
Assignee: Polaroid Corp
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Filing: 1981-09-02
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Granted: 1982-11-16
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Expires: 2001-09-02
Abstract
Abstract A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises coalescing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface, wherein said coalescence is carried out by contacting said fine-grain emulsion with a silver halide solvent in the vapor phase.
Inventors
- 👤 Vivian K. Walworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:12
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/765; G03C1/005; G03C1/74; Y; Y10; Y10S; Y10S430/00; Y10S430/136; Y10S430/149; Y10S430/162
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
53 words
A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises coalescing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface by contacting said fine-grain emulsion with a silver halide solvent in the vapor phase.
Claim 2
Independent Claim
53 words
A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises coalescing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface by contacting said fine-grain emulsion with a silver halide solvent in the vapor phase.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said spaced depressions are in a substantially planar surface.
Claim 4
Dependent Claim
18 words
The method of claim 1 which includes the step of depositing said fine-grain emulsion in said spaced depressions.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein said fine-grain emulsion comprises silver halide grains about 0.01 to 0.50 μm in average diameter.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein said fine-grain emulsion comprises grains about 0.1 μm or less in diameter.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said fine-grain emulsion has a binder to silver ratio of about 0.1 or less.
Claim 8
Dependent Claim
14 words
The method of claim 6 wherein said binder to silver ratio is about 0.075.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein said silver halide solvent is ammonia.
Claim 10
Independent Claim
87 words
A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises the following steps in sequence: (a) depositing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface; (b) contacting said fine-grain emulsion with a silver halide solvent in the vapor phase for a time sufficient to partially dissolve said grains in each depression; and (c) coalescing said grains to a single effective silver halide grain in substantially each depression.
Claim 11
Independent Claim
87 words
A method for forming a photosensitive element comprising a plurality of single effective silver halide grains in a predetermined spaced array which comprises the following steps in sequence: (a) depositing a fine-grain silver halide emulsion in a plurality of predetermined spaced depressions in a surface; (b) contacting said fine-grain emulsion with a silver halide solvent in the vapor phase for a time sufficient to partially dissolve said grains in each depression; and (c) coalescing said grains to a single effective silver halide grain in substantially each depression.
Claim 12
Dependent Claim
21 words
The method of claim 9 wherein said fine-grain emulsion comprises silver halide grains about 0.01 to 0.50 μm in average diameter.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein said fine-grain emulsion comprises grains about 0.1 μm or less in diameter.
Claim 14
Dependent Claim
20 words
The method of claim 9 wherein said fine-grain emulsion has a binder to silver ratio of about 0.1 or less.
Claim 15
Dependent Claim
14 words
The method of claim 12 wherein said binder to silver ratio is about 0.075.
Claim 16
Dependent Claim
11 words
The method of claim 9 wherein said silver solvent is ammonia.
Claim 17
Dependent Claim
15 words
The method of claim 9 which includes the step of washing said single effective grains.
Claim 18
Dependent Claim
16 words
The method of claim 9 which includes the step of chemically sensitizing said single effective grains.
Claim 19
Dependent Claim
18 words
The method of claim 9 which includes the step of spectrally sensitizing said single effective silver halide grains.
Claim 20
Dependent Claim
23 words
The method of claim 9 which includes applying a polymeric material over said fine-grain emulsion prior to contact with said silver halide solvent.
Claim 21
Dependent Claim
11 words
The method of claim 18 wherein said polymeric material is gelatin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |