Patent US521142A successfully refreshed from Google Patents.
US3746540A
Expired / Lapsed
US
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Tone reproduction in screen printing
Assignee: Continental Can Co Inc
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Filing: 1965-10-20
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Granted: 1973-07-17
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Expires: 1985-10-20
Abstract
Abstract A STENCIL FOR ELECTROSTATIC SCREEN REPRODUCTION OF HALFTONE PRINTING AND METHODS OF PRODUCING SUCH A STENCIL INCLUDING THE PRODUCTION OF CONTACT SCREENS BY NOVEL METHODS.
Inventors
- 👤 K Rarey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
B; B41; B41M; B41M1/00; B41M1/12; B41M1/125; G; G03; G03F; G03F7/00; G03F7/12; Y; Y10; Y10S; Y10S101/00; Y10S101/37
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |