US4153461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layer support for light-sensitive material adapted to be converted into a planographic printing plate
Assignee: Hoechst AG
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Filing: 1972-11-03
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Granted: 1979-05-08
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Expires: 1992-11-03
Abstract
Abstract This invention relates to an aluminum base material for presensitized printing plates. The aluminum has an anodically produced oxide layer on the surface thereof, which layer is at least 0.0002 mm. thick, and the oxide layer is reacted with polyvinyl phosphonic acid.
Inventors
- 👤 Gunter Berghauser
- 👤 Fritz Uhlig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:33
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038; B41N3/036; G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/144; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C1/1016; B41C2201/00; B41C2201/04; B41C2201/14; B41C2210/00; B41C2210/02; B41C2210/04; B41C2210/06; B41C2210/24; B41C2210/26; B41C2210/262
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
An aluminum base, for use in the manufacture of presensitized printing plates, having a surface which is the reaction product of polyvinyl phosphonic acid with an anodically produced aluminum oxide layer having a thickness in the range of about 0.0002 to 0.01 mm.
Claim 2
Dependent Claim
43 words
An aluminum base, for use in the manufacture of presensitized printing plates, having a surface which is the reaction product of polyvinyl phosphonic acid with an anodically produced aluminum oxide layer having a thickness in the range of about 0.0002 to 0.01 mm.
Claim 3
Dependent Claim
14 words
An aluminum base according to claim 1 including a light-sensitive layer on the surface.
Claim 4
Dependent Claim
25 words
An aluminum base according to claim 2 in which the light-sensitive layer contains a compound selected from the group consisting of diazo and azido compounds.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |