US3594289A
Expired / Lapsed
US
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Process for preparing a presensitized photolithographic printing plate
Assignee: WH Howson Ltd
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Filing: 1968-11-12
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Granted: 1971-07-20
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Expires: 1988-11-12
Abstract
Abstract PROCESS FOR PRODUCING A PRESENSITISED LITHOGRAPHIC PRINTING PLATE COMPRISING (I) ANODISING A SHEET OF ALUMINIUM OR ALUMINIUM ALLOY USING A PHOSPHORIC ACID AS ELECTROLYTE (II) COATING THE SHEET WITH A PHOTOPOLYMERISABLE RESIN AND (III) OPTIONALLY COLOURING THE RESIN COATING.
Inventors
- 👤 Leonard James Watkinson
- 👤 Brian Joseph Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:32
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/105; C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08; G03F7/038; G03F7/0388
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |