Patent US2710620A successfully refreshed from Google Patents.
Patent US4421841A successfully refreshed from Google Patents.
US4421841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive lithographic plate with sulfonate containing photosensitive polyester
Assignee: Mitsubishi Chemical Corp
•
Filing: 1982-07-14
•
Granted: 1983-12-20
•
Expires: 2002-07-14
Abstract
Abstract A photosensitive lithographic plate having, on a substrate, a photosensitive layer comprising a photosensitive polyester containing at least (A): (a) an aromatic dicarboxylic acid unit represented by the general formula: <IMAGE> (I) where m and n each represents an integer of 0 or 1, with at least one of them being 1, (b) a dicarboxylic acid unit having a sulfonate group, and (c) a diol unit represented by the general formula: <IMAGE> (II) represents a hydrogenated benzene ring, R1 and R2 each represents an alkylene group of 2-4 carbon atoms, R3 and R4 each represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, r and s each represents an integer of from 0 to 3 and t represents an integer of 0 or 1.
Inventors
- 👤 Shigeki Shimizu
- 👤 Akinobu Oshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:57
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0384; C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6888; G03F7/027; G03F7/032
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A photosensitive lithographic plate having, on a substrate, a photosensitive layer comprising a photosensitive polyester containing at least (A): (a) an aromatic dicarboxylic acid unit represented by the general formula: ##STR18## where m and n each represents an integer of 0 or 1, with at least one of them being 1, (b) a dicarboxylic acid unit having a sulfonate group, and (c) a diol unit represented by the general formula: ##STR19## represents a hydrogenated benzene ring, R 1 and R 2 each represents an alkylene group of 2-4 carbon atoms, R 3 and R 4 each represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, r and s each represents an integer of from 0 to 3 and t represents an integer of 0 or 1.
Claim 2
Dependent Claim
129 words
A photosensitive lithographic plate having, on a substrate, a photosensitive layer comprising a photosensitive polyester containing at least (A): (a) an aromatic dicarboxylic acid unit represented by the general formula: ##STR18## where m and n each represents an integer of 0 or 1, with at least one of them being 1, (b) a dicarboxylic acid unit having a sulfonate group, and (c) a diol unit represented by the general formula: ##STR19## represents a hydrogenated benzene ring, R 1 and R 2 each represents an alkylene group of 2-4 carbon atoms, R 3 and R 4 each represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, r and s each represents an integer of from 0 to 3 and t represents an integer of 0 or 1.
Claim 3
Dependent Claim
131 words
The photosensitive lithographic plate according to claim 1, wherein the photosensitive polyester (A) contains, (a) an aromatic dicarboxylic acid unit represented by the general formula (I) ##STR20## where m and n each represents an integer of 0 or 1, with at least one of them being 1, (b) a dicarboxylic acid unit having a sulfonate group, (c) the diol unit represented by the general formula (II) ##STR21## represents a hydrogenated benzene ring, R 1 and R 2 each represents an alkylene group of 2-4 carbon atoms, R 3 and R 4 each represents a hydrogen atom or an alkyl group of 1-6 carbon atoms, r and s each represents an integer of from 0 to 3 and t represents an integer of 0 or 1, and (d) an aliphatic diol unit.
Claim 4
Dependent Claim
37 words
The photosensitive lithographic plate according to claim 1 or 2 wherein the photosensitive layer further contains, (B) an ethylenically unsaturated compound having at least two terminal unsaturated double bonds enabling addition polymerization, and (C) a photopolymerization initiator.
Claim 5
Dependent Claim
17 words
The photosensitive lithographic plate according to claim 3, wherein the photopolymerization initiator (C) is a photoinitiator system.
Claim 6
Dependent Claim
21 words
The photosensitive lithographic plate according to claim 2, wherein the photosensitive layer further contains: (D) a resin containing phenolic hydroxy group.
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |