Patent US3666479A successfully refreshed from Google Patents.
US3666479A
Expired / Lapsed
US
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Print containing different numbers of dots in light and dark tonal areas
Assignee: RAYMOND H WIESE
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Filing: 1967-01-03
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Granted: 1972-05-30
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Expires: 1987-01-03
Abstract
Abstract A METHOD FOR PRODUCING A HALFONE SCREEN WHICH CONTAINS A DIFFERENT NUMBER OF DOTS IN DIFFERENT TONAL AREAS AND A CONTACT PRINT MADE FROM THE USE OF THIS SCREEN.
Inventors
- 👤 Raymond H Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:23
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/14
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |