US4092169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodized aluminum photographic plates with silver bromide in pores of oxide layer, and process of manufacture thereof
Assignee: Fujifilm Holdings Corp
•
Filing: 1974-03-12
•
Granted: 1978-05-30
•
Expires: 1994-03-12
Abstract
Abstract An improved photographic element having high photosensitivity, which element comprises an anodized aluminum plate as a support having silver halide adsorbed in the pores of the oxide layer on the surface of said plate. The improvement comprises adding aqueous ammonia to a solution of silver nitrate used in forming said silver halide, the amount of aqueous ammonia being sufficient to raise the photosensitivity of the element.
Inventors
- 👤 Isao Kumasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/77; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
89 words
In a method for manufacturing a photographic element of improved photosensitivity comprising applying a solution of silver nitrate to an anodized aluminum plate having an oxide layer containing pores therein on the surface of said plate and then applying a solution of an alkali metal bromide to said aluminum plate to incorporate silver bromide into the pores of said oxide layer, the improvement which comprises said solution of silver nitrate containing additionally aqueous ammonia in an amount such that the silver oxide precipitate initially formed just redissolves and disappears.
Claim 2
Dependent Claim
89 words
In a method for manufacturing a photographic element of improved photosensitivity comprising applying a solution of silver nitrate to an anodized aluminum plate having an oxide layer containing pores therein on the surface of said plate and then applying a solution of an alkali metal bromide to said aluminum plate to incorporate silver bromide into the pores of said oxide layer, the improvement which comprises said solution of silver nitrate containing additionally aqueous ammonia in an amount such that the silver oxide precipitate initially formed just redissolves and disappears.
Claim 3
Dependent Claim
17 words
The method as claimed in claim 1, in which said silver nitrate solution contains a hydrophilic binder.
Claim 4
Dependent Claim
29 words
The method as claimed in claim 2, in which said binder is selected from the group consisting of gelatin and derivatives thereof, polyvinyl alcohol, methyl cellulose and gum arabic.
Claim 5
Dependent Claim
13 words
The method as claimed in claim 3, in which said binder is gelatin.
Claim 6
Dependent Claim
28 words
The method as claimed in claim 2, wherein the amount of said hydrophilic binder is from 0.1 to 1% based on the amount of said silver nitrate solution.
Claim 7
Dependent Claim
16 words
The method as claimed in claim 1 in which said aluminum plate is substantially pure aluminum.
Claim 8
Dependent Claim
26 words
The method as claimed in claim 1, in which said aluminum plate is an aluminum-copper alloy containing from about 0.05 to 1.0 percent by weight copper.
Claim 9
Dependent Claim
29 words
The photosensitive material comprising an anodized aluminum plate, said anodized layer containing a photosensitive silver bromide in the pores of said layer, prepared by the process of claim 1.
Claim 10
Dependent Claim
18 words
The photosensitive material as claimed in claim 8, in which said silver nitrate solution contains a hydrophilic binder.
Claim 11
Dependent Claim
30 words
The photosensitive material as claimed in claim 9, in which said binder is selected from the group consisting of geletin and derivative thereof, polyvinyl alcohol, methyl cellulose and gum arabic.
Claim 12
Dependent Claim
14 words
The photosensitive material as claimed in claim 10, in which said binder is gelatin.
Claim 13
Dependent Claim
30 words
The photosensitive material as claimed in claim 9, wherein said hydrophilic binder is present in an amount between 0.1 and 1% based on the amount of said silver nitrate solution.
Claim 14
Dependent Claim
16 words
The photosensitive material as claimed in claim 8, in which aluminum plate is substantially pure aluminum.
Claim 15
Dependent Claim
27 words
The photosensitive material as claimed in claim 8, in which said aluminum plate is an aluminum-copper alloy containing from about 0.05 to 1.0 percent by weight copper.
References Cited (Backward Citations)
US2126017A
Cited
US2115339A
Cited
US2598043A
Cited
US2766119A
Cited
US2995443A
Cited
US3250215A
Cited
US3275440A
Cited
US3511661A
Cited
US3811894A
Cited
US3615553A
Cited
US3776734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |