US2546338A
Expired / Lapsed
US
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Circuit for minimizing transients during switching between two video channels
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1947-05-13
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Granted: 1951-03-27
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Expires: 1967-05-13
Abstract
No abstract record available.
Inventors
- 👤 Glenn M Glasford
- 👤 Edward M Usher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:01
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/222; H04N5/262; H04N5/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043997A
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US2164297A
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US2244240A
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US2307375A
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US2240420A
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US2412279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |