US3567445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Presensitized lithographic plate with two differentially spectrally sensitized layers separated by a novolak resin
Assignee: Polychrome Corp
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Filing: 1967-10-20
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Granted: 1971-03-02
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Expires: 1987-10-20
Abstract
Abstract THE APPLICATION DESCRIBES A COMPOSITE PRESENSITISED LITHOGRAPHIC PLATE WHICH COMPRISES A HYDROPHILIC-SURFACE SUPPORT BASE AND COATED THEREON, IN ORDER, A FIRST LIGHTSENSITIVE LAYER WHICH IS AN ADHERENT LIGHT-SENSITIVE LAYER OF THE TYPE WHICH IS CAPABE OF BEING USED AS THE LIGHTSENSITIVE LAYER IN A NEGATIVE-WORKING PRESENSITISED LITHOGRAPHIC PLATE, AN INTERMIEDIATE PROTECTIVE LAYER OR LAYERS, THE LAYER OR IF THERE IS MORE THAN ONE LAYER, THE LAYER WHICH IS NEAREST TO THE SAID FIRST LAYER, BEING A NONHARDENABLE RESIN OF THE CONDENSED PHENOL-CARBONYL COMPOUND TYPE, AND A SECOND LIGHT-SENSITIVE LAYER WHICH IS A SILVER HALIDE EMULSION LAYER.
Inventors
- 👤 Lawrence Atkinson
- 👤 Leonard Roy Brooker
- 👤 Brian Ronald David Whitear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0952; G03C; G03C1/00; G03C1/005; G03C1/46; G03F7/06; Y; Y10; Y10S; Y10S280/00; Y10S280/06
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |