Patent US4028111A successfully refreshed from Google Patents.
US4028111A
Expired / Lapsed
US
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Light-sensitive lithographic printing plate
Assignee: Fujifilm Holdings Corp
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Filing: 1975-02-25
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Granted: 1977-06-07
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Expires: 1995-02-25
Abstract
Abstract A light-sensitive lithographic printing plate comprising a support with a hydrophilic surface having thereon a light-sensitive layer comprising a light-sensitive polyester containing o-quinonediazido groups as terminal groups.
Inventors
- 👤 Masayuki Iwasaki
- 👤 Hiroshi Misu
- 👤 Shizuo Miyano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:08
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022; G03F7/023
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A light-sensitive lithographic printing plate comprising a support with a hydrophilic surface having thereon a light-sensitive layer comprising a light-sensitive polyester, containing o-quinonediazide groups as terminals, represented by the formula: ##STR7## wherein X represents a sulfonyl group or a carbonyl group; wherein R represents an aromatic o-quinonediazide group in which the aromatic ring can be substituted with a substituent which does not hinder the photolysis of said o-quinonediazide group; n represents an integer of 2 to 10; and m represents an integer of 2 to 50.
Claim 2
Dependent Claim
86 words
A light-sensitive lithographic printing plate comprising a support with a hydrophilic surface having thereon a light-sensitive layer comprising a light-sensitive polyester, containing o-quinonediazide groups as terminals, represented by the formula: ##STR7## wherein X represents a sulfonyl group or a carbonyl group; wherein R represents an aromatic o-quinonediazide group in which the aromatic ring can be substituted with a substituent which does not hinder the photolysis of said o-quinonediazide group; n represents an integer of 2 to 10; and m represents an integer of 2 to 50.
Claim 3
Dependent Claim
44 words
The light-sensitive lithographic printing plate of claim 1, wherein said aromatic o-quinonediazide group is a 1,2-benzoquinonediazide group, a 1,2-naphthoquinonediazide group, a 3,3',4,4'-diphenyl-bis-quinonediazide group or a 2,3-phenanthrenequinonediazide group and wherein said substituent which does not hinder photolysis is an alkyl group or an alkoxy group.
Claim 4
Dependent Claim
25 words
The light-sensitive lithographic printing plate of claim 1, wherein said light-sensitive layer includes at least one of a dye, a plasticizer, or a spiropyran compound.
Claim 5
Dependent Claim
28 words
The light-sensitive lithographic printing plate of claim 1, wherein said light-sensitive layer is present in an amount of from about 0.1 to 3 g/m 2 of said support.
Claim 6
Dependent Claim
17 words
The light-sensitive lithographic printing plate of claim 1, wherein said light-sensitive layer includes an alkali solution-soluble resin.
Claim 7
Dependent Claim
26 words
The light-sensitive lithographic printing plate of claim 5, wherein said alkali solution-soluble resin is a phenol-formaldehyde resin, a cresol resin, a styrene-maleic anhydride copolymer or shellac.
Claim 8
Dependent Claim
36 words
The light-sensitive lithographic printing plate of claim 5, wherein said light-sensitive layer contains said alkali solution-soluble resin in an amount of about 10 to 50% by weight based on the total weight of said light-sensitive layer.
Claim 9
Dependent Claim
52 words
The light-sensitive lithographic printing plate of claim 1, wherein said support is a paper, a paper laminated with a synthetic resin, a metal, a synthetic resin film, a paper laminated with or having deposited thereon a metal layer, or a synthetic resin film laminated with or having deposited thereon a metal layer.
Claim 10
Dependent Claim
25 words
The light-sensitive lithographic printing plate of claim 3, wherein said support comprises an aluminum support or a polyethylene terephthalate film having thereon an aluminum layer.
Claim 11
Dependent Claim
18 words
A light-sensitive lithographic printing plate of claim 9, wherein said aluminum support is an anodically oxidized aluminum support.
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |