Patent US5368974A successfully refreshed from Google Patents.
US5368974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithographic printing plates having a hydrophilic barrier layer comprised of a copolymer of vinylphosphonic acid and acrylamide overlying an aluminum support
Assignee: Eastman Kodak Co
•
Filing: 1993-05-25
•
Granted: 1994-11-29
•
Expires: 2013-05-25
Abstract
Abstract Improved lithographic printing plates are comprised of an aluminum support, a hydrophilic barrier layer comprised of a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide overlying said support, and an image-forming layer capable of providing a lithographic printing surface overlying said barrier layer.
Inventors
- 👤 John E. Walls
- 👤 Paul R. West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:12
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11; B; B41; B41N; B41N3/00; B41N3/03; B41N3/036; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C2210/00; B41C2210/02; B41C2210/04; B41C2210/24
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A lithographic printing plate comprising: (1) an aluminum support; (2) a hydrophilic barrier layer; and (3) an image-forming layer that is capable of providing a lithographic printing surface; said hydrophilic barrier layer being in direct contact with said aluminum support and interposed between said aluminum support and said image-forming layer and being comprised of a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide.
Claim 2
Dependent Claim
75 words
A lithographic printing plate comprising: (1) an aluminum support; (2) a hydrophilic barrier layer; and (3) an image-forming layer that is capable of providing a lithographic printing surface; said hydrophilic barrier layer being in direct contact with said aluminum support and interposed between said aluminum support and said image-forming layer and being comprised of a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide.
Claim 3
Dependent Claim
20 words
A lithographic printing plate as claimed in claim 1 wherein said aluminum support is comprised of grained and anodized aluminum.
Claim 4
Dependent Claim
27 words
A lithographic printing plate as claimed in claim 1 wherein said copolymer comprises 70 to 85 mole percent vinylphosphonic acid and 15 to 30 mole percent acrylamide.
Claim 5
Dependent Claim
14 words
A lithographic printing plate as claimed in claim 1 wherein said plate is negative-working.
Claim 6
Dependent Claim
14 words
A lithographic printing plate as claimed in claim 1 wherein said plate is positive-working.
Claim 7
Dependent Claim
21 words
A lithographic printing plate as claimed in claim 1 including a radiation-sensitive layer comprising a diazo resin and a polymeric binder.
Claim 8
Dependent Claim
17 words
A lithographic printing plate as claimed in claim 1 including a radiation-sensitive layer comprising a photocrosslinkable polymer.
Claim 9
Dependent Claim
31 words
A lithographic printing plate as claimed in claim 1 comprising a first radiation-sensitive layer comprising a diazo resin and a polymeric binder and a second radiation-sensitive layer comprising a photocrosslinkable polymer.
Claim 10
Independent Claim
76 words
A method for the manufacture of a lithographic printing plate, which method comprises: providing an aluminum support material; forming on the surface of said aluminum support material a hydrophilic barrier layer comprising a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide; and coating the surface of said hydrophilic barrier layer with a radiation-sensitive coating composition which is capable of forming a lithographic printing surface.
Claim 11
Independent Claim
76 words
A method for the manufacture of a lithographic printing plate, which method comprises: providing an aluminum support material; forming on the surface of said aluminum support material a hydrophilic barrier layer comprising a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide; and coating the surface of said hydrophilic barrier layer with a radiation-sensitive coating composition which is capable of forming a lithographic printing surface.
Claim 12
Independent Claim
86 words
A method for the manufacture of a lithographic printing plate, which method comprises: providing a grained and anodized aluminum support material; forming on the grained and anodized surface of said aluminum support material by an electrochemical process a hydrophilic barrier layer comprising a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide; and coating the surface of said hydrophilic barrier layer with a radiation-sensitive coating composition which is capable of forming a lithographic printing surface.
Claim 13
Independent Claim
86 words
A method for the manufacture of a lithographic printing plate, which method comprises: providing a grained and anodized aluminum support material; forming on the grained and anodized surface of said aluminum support material by an electrochemical process a hydrophilic barrier layer comprising a copolymer of about 40 to about 90 mole percent vinylphosphonic acid and about 10 to about 60 mole percent acrylamide; and coating the surface of said hydrophilic barrier layer with a radiation-sensitive coating composition which is capable of forming a lithographic printing surface.
References Cited (Backward Citations)
US3220832A
Cited
US4153461A
Cited
US4383897A
Cited
US4399021A
Cited
US4448647A
Cited
US4452674A
Cited
US4427765A
Cited
US4458005A
Cited
US4376814A
Cited
US4689272A
Cited
US4578156A
Cited
ZA86876B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-28 | 1998-05-30 | 1998-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-28 | 2002-05-30 | 2002-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-28 | 2006-05-30 | 2006-11-29 | $7700.00 | Window Closed / Lapsed |