US3588322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knockout masking techniques
Assignee: Printing Developments Inc
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Filing: 1967-06-28
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Granted: 1971-06-28
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Expires: 1987-06-28
Abstract
Abstract IN ELECTRICALLY PRODUCING COLOR SEPARATIONS FROM IMAGE SIGNALS OF AN ORIGINAL, A HEAD SCANS A KNOCKOUT MASK WITH COLORED DETAILS TO DERIVE THREE COLOR COMPONENT SIGNALS OF WHICH EACH ACTUATES A CORRESPONDING TRIGGER UPON REACHING A MINIMUM THRESHOLD, AND A "BLACK" TRIGGER IS ACTUATED WHEN ALL THREE SIGNALS ARE MINIMUM. ACTUATION OF DIFFERENT TRIGGERS SERVES TO REPLACE THE IMAGE SIGNALS BY DIFFERENT SETS OF FIXED SIGNALS CAUSING ULTIMATE REPRODUCTION OF SCANNED MASK DETAILS IN DIFFERENT COLORS. THE MASK IS A COMPOSITE OF DIFFERENTLY COLOR-TONED BLACK-AND-WHITE FILM SECTIONS.
Inventors
- 👤 Karl Bartel
- 👤 Austin Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; H04N1/3872; H04N1/46
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |