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US2697742A
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Switching apparatus
Assignee: RCA Corp
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Filing: 1950-05-29
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Granted: 1954-12-21
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Evans John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:00
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22; H04N9/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2415059A
Cited
US2490812A
Cited
US2553182A
Cited
US2545325A
Cited
US2587074A
Cited
US2621244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |