Patent US2922194A successfully refreshed from Google Patents.
US4356257A
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US
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Photosensitive silver halide element and method of preparing same
Assignee: Polaroid Corp
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Filing: 1981-09-02
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Granted: 1982-10-26
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Expires: 2001-09-02
Abstract
Abstract A method for forming a photosensitive element comprising a plurality of single effective siler halide grains in a predetermined spaced array which comprises coalescing fine-grain silver halide in a plurality of predetermined spaced depressions in a surface, thereby forming in situ a single effective silver halide grain in each of said depressions and a photosensitive element comprising coalesced single effective silver halide grains in a predetermined spaced array.
Inventors
- 👤 Arthur M. Gerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:30
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
42 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 fine-grain silver halide in a polymeric binder material in a plurality of predetermined spaced depressions in a surface.
Claim 2
Independent Claim
42 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 fine-grain silver halide in a polymeric binder material in a plurality of predetermined spaced depressions in a surface.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein said spaced depressions are in a planar surface.
Claim 4
Dependent Claim
19 words
The method of claim 1 which includes the step of depositing said fine-grain silver halide in said spaced depressions.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said fine-grain silver halide is a fine-grain silver halide emulsion.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein said fine-grain emulsion comprises silver halide grains about 0.01 to 0.50 μm in average diameter.
Claim 7
Dependent Claim
18 words
The method of claim 5 wherein said fine-grain emulsion comprises grains about 0.1 μm or less in diameter.
Claim 8
Dependent Claim
20 words
The method of claim 4 wherein said fine-grain emulsion has a binder to silver ratio of about 0.10 or less.
Claim 9
Dependent Claim
14 words
The method of claim 7 wherein said binder to silver ratio is about 0.075.
Claim 10
Dependent Claim
25 words
The method of claim 4 wherein said coalescence is carried out by the partial dissolution of the silver halide grains in each of said depressions.
Claim 11
Dependent Claim
22 words
The method of claim 9 wherein said partial dissolution is carried out by the application of a solution of silver halide solvent.
Claim 12
Dependent Claim
13 words
The method of claim 10 wherein said silver halide solvent is ammonium thiocyanate.
Claim 13
Dependent Claim
16 words
The method of claim 10 wherein said silver halide solvent is ammonium thiocyanate and potassium bromide.
Claim 14
Dependent Claim
17 words
The method of claim 10 wherein said solution of silver halide solvent includes a polymeric binder material.
Claim 15
Dependent Claim
12 words
The method of claim 13 wherein said polymeric binder material is gelatin.
Claim 16
Dependent Claim
13 words
The method of claim 10 wherein said coalescence includes the application of heat.
Claim 17
Dependent Claim
17 words
The method of claim 15 which includes the step of cooling subsequent to said application of heat.
Claim 18
Dependent Claim
16 words
The method of claim 9 wherein a cover sheet is superposed over said depressions during coalescence.
Claim 19
Dependent Claim
15 words
The method of claim 17 wherein said cover sheet is removed subsequent to said coalescence.
Claim 20
Independent Claim
85 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) applying a solution of silver halide solvent in an amount sufficient to partially dissolve said silver halide grains in each depression; and (c) coalescing said silver halide grains to a single effective silver halide grain in substantially each depression.
Claim 21
Independent Claim
85 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) applying a solution of silver halide solvent in an amount sufficient to partially dissolve said silver halide grains in each depression; and (c) coalescing said silver halide grains to a single effective silver halide grain in substantially each depression.
Claim 22
Dependent Claim
29 words
The method of claim 19 which includes the step of applying a cover sheet over said depressions substantially contemporaneously with the application of said solution of silver halide solvent.
Claim 23
Dependent Claim
38 words
The method of claim 19 wherein said solution of silver halide solvent is disposed in a nip formed by a cover sheet and said depressions and applying pressure to said cover sheet and the element comprising said depressions.
Claim 24
Dependent Claim
25 words
The method of claim 21 wherein said pressure is applied by passing said cover sheet and the element comprising said depressions between pressure applying rollers.
Claim 25
Dependent Claim
13 words
The method of claim 19 wherein said coalescence includes the application of heat.
Claim 26
Dependent Claim
17 words
The method of claim 23 which includes the step of cooling subsequent to said application of heat.
Claim 27
Dependent Claim
15 words
The method of claim 20 wherein said cover sheet is removed subsequent to said coalescence.
Claim 28
Dependent Claim
21 words
The method of claim 19 wherein said fine-grain emulsion comprises silver halide grains about 0.01 to 0.50 μm in average diameter.
Claim 29
Dependent Claim
18 words
The method of claim 26 wherein said fine-grain emulsion comprises grains about 0.1 μm or less in diameter.
Claim 30
Dependent Claim
20 words
The method of claim 19 wherein said fine-grain emulsion has a binder to silver ratio of about 0.10 or less.
Claim 31
Dependent Claim
14 words
The method of claim 28 wherein said binder to silver ratio is about 0.075.
Claim 32
Dependent Claim
13 words
The method of claim 19 wherein said silver halide solvent is ammonium thiocyanate.
Claim 33
Dependent Claim
16 words
The method of claim 19 wherein said silver halide solvent comprises ammonium thiocyanate and potassium bromide.
Claim 34
Dependent Claim
17 words
The method of claim 19 wherein said solution of silver halide solvent includes a polymeric binder material.
Claim 35
Dependent Claim
12 words
The method of claim 32 wherein said polymeric binder material is gelatin.
Claim 36
Dependent Claim
25 words
A photosensitive element comprising a predetermined spaced array of coalesced single effective silver halide grains in a plurality of predetermined spaced depressions in a surface.
Claim 37
Dependent Claim
25 words
A photosensitive element comprising a predetermined spaced array of coalesced single effective silver halide grains in a plurality of predetermined spaced depressions in a surface.
Claim 38
Dependent Claim
14 words
The element of claim 34 wherein each of said grains is a flat plate.
Claim 39
Dependent Claim
17 words
The element of claim 34 wherein each of said grains comprises clusters of fused silver halide subunits.
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) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |