US4483913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planographic printing plate
Assignee: Polychrome Corp
•
Filing: 1983-07-18
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Granted: 1984-11-20
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Expires: 2003-07-18
Abstract
Abstract An improved planographic printing plate comprised of a metal substrate, a sealing layer, an interlayer formed from a monomer or polymer of an organic compound having at least one cationic, quaternary sustituted ammonium group, and a photosensitive layer on the surface of the interlayer. The printing plates are water developable and characterized by cleaner non-imaging areas during printing operations. The method of preparing such planographic printing plates is also described and illustrated.
Inventors
- 👤 Nils Eklund
- 👤 Jen-Chi Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A method for preparing a planographic printing plate starting from an anodized, grained and/or etched metal substrate having a hydrophilic sealing layer on at least one surface thereof, which method comprises contacting said starting metal substrate with a solution of a hydrophilic monomer or polymer of an organic compound having at least one cationic, quaternary substituted ammonium group with substituents selected from the group consisting of alkyl groups having from 1-25 carbon atoms and aryl groups having from 1 to 20 carbon atoms, to form an overlying layer, and then coating said overlaying layer with a photosensitive diazo material.
Claim 2
Independent Claim
99 words
A method for preparing a planographic printing plate starting from an anodized, grained and/or etched metal substrate having a hydrophilic sealing layer on at least one surface thereof, which method comprises contacting said starting metal substrate with a solution of a hydrophilic monomer or polymer of an organic compound having at least one cationic, quaternary substituted ammonium group with substituents selected from the group consisting of alkyl groups having from 1-25 carbon atoms and aryl groups having from 1 to 20 carbon atoms, to form an overlying layer, and then coating said overlaying layer with a photosensitive diazo material.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the metal substrate is an aluminum substrate.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said hydrophilic sealing layer is a silicate.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the overlying layer is formed from an organic compound having two such cationic, quaternary substituted ammonium groups.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said hydrophilic organic monomer or polymer is poly(dimethyldiallylammonium chloride).
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said hydrophilic organic monomer or polymer is 1,5 dimethyl-1,5 diaza undecamethylene polymetho bromide.
Claim 8
Dependent Claim
15 words
The method of claim 1 wheren said hydrophilic organic monomer or polymer is dimethyldiallylammonium chloride.
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |