Patent US1498358A successfully refreshed from Google Patents.
Patent US3565527A successfully refreshed from Google Patents.
US3565527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact screen for rotogravure direct printing and offset printing systems
Assignee: Individual
•
Filing: 1969-06-16
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Granted: 1971-02-23
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Expires: 1989-06-16
Abstract
Abstract A CONTACT SCREEN FOR ROTOGRAVURE DIRECT PRINTING AND OFFSET PRINTING, BOTH NEGATIVE AND POSITIVE, WHICH HAS A PLURALITY OF POINTS SEPARATED FROM ONE ANOTHER BY LINES AND EACH POINT IS MADE UP OF ZONES. THE DENSITY GRADATION OF EACH POINT VARIES PROGRESSIVELY AND DIFFERENTLY IN ADJACENT ZONES FROM BRTWEEN THE CENTER OF THAT POINT AND A SIDE THEREOF. THE LINES WHICH SEPARATE THE POINTS HAVE AT ADJACENT SIDES OF A POINT DIFFERENT WIDTHS, AND THE NUMBER OF LINES IN ONE CENTIMETER AT ONE SIDE OF THE POINTS IS DIFFERENT FROM THAT AT THE ADJACENT SIDE OF THE POINTS. PREFERABLY THE POINT IS RECTANGULAR IN SHAPE.
Inventors
- 👤 Claudio Crespi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:38
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/14; G03F5/16
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |