Patent US4456670A successfully refreshed from Google Patents.
US4456670A
Expired / Lapsed
US
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Photosensitive material for lithographic printing
Assignee: Fujifilm Holdings Corp
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Filing: 1982-08-06
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Granted: 1984-06-26
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Expires: 2002-08-06
Abstract
Abstract A photosensitive material for lithographic printing comprising a photosensitive layer, an aluminum foil and a paper base in that order. An intermediate layer containing colloidal silica and/or colloidal alumina is formed between the photosensitive layer and the aluminum foil. The material has good stability and can produce a large number of high quality printed copies.
Inventors
- 👤 Takao Nakayama
- 👤 Chikashi Ohishi
- 👤 Sho Nakao
- 👤 Keisuke Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:30
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A photosensitive material for lithographic printing, comprising: a paper support base; an aluminum foil layer positioned on a surface of the support base, an intermediate layer comprising particles selected from the group consisting of colloidal silica particles colloidal alumina particles and mixtures thereof the intermediate layer positioned on the aluminum foil layer wherein the intermediate layer has a thickness from about 0.01 to 10 μm; and a photoconductive layer positioned on the intermediate layer.
Claim 2
Dependent Claim
74 words
A photosensitive material for lithographic printing, comprising: a paper support base; an aluminum foil layer positioned on a surface of the support base, an intermediate layer comprising particles selected from the group consisting of colloidal silica particles colloidal alumina particles and mixtures thereof the intermediate layer positioned on the aluminum foil layer wherein the intermediate layer has a thickness from about 0.01 to 10 μm; and a photoconductive layer positioned on the intermediate layer.
Claim 3
Dependent Claim
36 words
A photosensitive material as claimed in claim 1, further comprising: a layer having electroconductive particles dispersed in a resin formed on a surface of the paper support base opposite the surface coated with the aluminum foil.
Claim 4
Dependent Claim
35 words
A photosensitive material as claimed in claim 1, further comprising: a layer comprising a highly conductive charge transfer complex formed on a surface of the paper base opposite the surface coated with the aluminum foil.
Claim 5
Dependent Claim
32 words
A photosensitive material as claimed in claim 1, further comprising: a layer comprising a metalized film formed on a surface of the paper base opposite the surface coated with the aluminum foil.
Claim 6
Dependent Claim
31 words
A photosensitive material as claimed in claim 1, further comprising: a layer comprising a foil formed on a surface of the paper base opposite the surface coated with the aluminum foil.
Claim 7
Dependent Claim
24 words
A photosensitive material for lithographic printing as claimed in claim 1, wherein the particles have a particle diameter of from 1 to 100 μm.
Claim 8
Dependent Claim
25 words
A photosensitive material for lithographic printing as in claim 1, wherein said intermediate layer comprises a mixture of colloidal silica particles and colloidal alumina particles.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |