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Patent US3218971A successfully refreshed from Google Patents.
US3218971A
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Printing plate
Assignee: Rowland Products Inc
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Filing: 1963-02-14
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Granted: 1965-11-23
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Expires: 1983-02-14
Abstract
No abstract record available.
Inventors
- 👤 William P Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
B; B41; B41N; B41N1/00; B41N1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PRINTING PLATE COMPRISING AN EXTRUDED SHEET OF SYNTHETIC THERMOPLASTIC MATERIAL INTEGRALLY FORMED WITH A BASE LAYER AND A TOP LAYER EACH OF SUBSTANTIALLY UNIFORM THICKNESS THROUGHOUT, EACH OF SAID LAYERS BEING OF SUBSTANTIALLY THE SAME SYNTHETIC THERMOPLASTIC MATERIAL AND FUSED TOGETHER ALONG THE INTERFACE THEREBETWEEN TO PROVIDE AN INTEGRAL SHEET, SAID TOP LAYER CONTAINING PIGMENT VISUALLY DIFFERENTIATING SAID TOP LAYER FROM SAID BASE LAYER, SAID TOP LAYER HAVING A SUBSTANTIALLY UNIFORM OUTER SURFACE FINISH, SAID SHEET BEING ABOUT 0.025 TO 0.050 INCH IN THICKNESS AND SAID TOP LAYER BEING ABOUT 1 TO 10 PERCENT OF THE THICKNESS OF SAID SHEET AND ABOUT 0.001 TO 0.005 INCH IN THICKNESS.
Claim 2
Dependent Claim
109 words
A PRINTING PLATE COMPRISING AN EXTRUDED SHEET OF SYNTHETIC THERMOPLASTIC MATERIAL INTEGRALLY FORMED WITH A BASE LAYER AND A TOP LAYER EACH OF SUBSTANTIALLY UNIFORM THICKNESS THROUGHOUT, EACH OF SAID LAYERS BEING OF SUBSTANTIALLY THE SAME SYNTHETIC THERMOPLASTIC MATERIAL AND FUSED TOGETHER ALONG THE INTERFACE THEREBETWEEN TO PROVIDE AN INTEGRAL SHEET, SAID TOP LAYER CONTAINING PIGMENT VISUALLY DIFFERENTIATING SAID TOP LAYER FROM SAID BASE LAYER, SAID TOP LAYER HAVING A SUBSTANTIALLY UNIFORM OUTER SURFACE FINISH, SAID SHEET BEING ABOUT 0.025 TO 0.050 INCH IN THICKNESS AND SAID TOP LAYER BEING ABOUT 1 TO 10 PERCENT OF THE THICKNESS OF SAID SHEET AND ABOUT 0.001 TO 0.005 INCH IN THICKNESS.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |