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
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Filing: 1993-05-25
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Granted: 1994-11-29
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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 18:09
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.
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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) | 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 |