US4902600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive material comprising light-sensitive layer provided on support wherein the light-sensitive layer and support have specified pH values
Assignee: Fujifilm Holdings Corp
•
Filing: 1988-08-09
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Granted: 1990-02-20
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Expires: 2008-08-09
Abstract
Abstract A light-sensitive material comprises a paper support and a light-sensitive layer containing silver halide grains, a reducing agent and an ethylenic unsaturated polymerizable compound. The silver halide grains and polymerizable compound are contained in microcapsules which are dispersed in the light-sensitive layer. The light-sensitive layer has a pH value of not higher than 8. The paper support has a pH value of from 5 to 9. An image-forming method employing the light-sensitive material is also disclosed.
Inventors
- 👤 Shigehisa Tamagawa
- 👤 Masayuki Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:35
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/0285; G03C; G03C1/00; G03C1/76; G03C1/775; Y; Y10; Y10S; Y10S430/00; Y10S430/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
68 words
A light-sensitive material comprising a paper support and a light-sensitive layer containing silver halide grains, a reducing agent and an ethylenic unsaturated polymerizable compound, said silver halide grains and polymerizable compound being contained in microcapsules which are dispersed in the light-sensitive layer, wherein the light-sensitive layer has a pH value of not higher than 7 and the paper support has a pH value of from 5 to 9.
Claim 2
Dependent Claim
68 words
A light-sensitive material comprising a paper support and a light-sensitive layer containing silver halide grains, a reducing agent and an ethylenic unsaturated polymerizable compound, said silver halide grains and polymerizable compound being contained in microcapsules which are dispersed in the light-sensitive layer, wherein the light-sensitive layer has a pH value of not higher than 7 and the paper support has a pH value of from 5 to 9.
Claim 3
Dependent Claim
21 words
The light-sensitive material as claimed in claim 1, wherein the paper support has a pH value of from 6 to 8.5.
Claim 4
Dependent Claim
46 words
The light-sensitive material as claimed in claim 1, wherein the paper support contains a neutral internal size selected from the group consisting of a fatty acid anhydride, a rosin acid anhydride, an alkenyl-succinic anhydride, a succinamide, isopropenyl stearate, aziridine, an aziridine derivative and an alkylketene dimer.
Claim 5
Dependent Claim
39 words
The light-sensitive material as claimed in claim 1, wherein the paper support contains a fixing agent which is a neutral or weak alkaline compound selected from the group consisting of a cationic starch, polyamide-polyamine-epichlorohydrin, polyacrylamide and a polyacrylamide derivative.
Claim 6
Dependent Claim
17 words
The light-sensitive material as claimed in claim 1, wherein the reducing agent is contained in the microcapsules.
Claim 7
Dependent Claim
23 words
The light-sensitive material as claimed in claim 1, wherein the light-sensitive layer contains a base precursor which is arranged outside of the microcapsules.
Claim 8
Dependent Claim
28 words
The light-sensitive material as claimed in claim 1, wherein the light-sensitive layer contains a color image forming substance, said color image forming substance being contained in the microcapsules.
Claim 9
Dependent Claim
17 words
The light-sensitive material as claimed in claim 1, wherein the light-sensitive layer contains an organic silver salt.
References Cited (Backward Citations)
US3767400A
Cited
US3694252A
Cited
US3694253A
Cited
JPS526645A
Cited
US4255491A
Cited
US4265978A
Cited
US4482628A
Cited
US4335184A
Cited
US4624910A
Cited
US4629676A
Cited
US4649098A
Cited
US4682191A
Cited
EP0203613A2
Cited
US4775656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |