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Patent US4902600A successfully refreshed from Google Patents.
US4902600A
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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
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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 08:45
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.
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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 |