US2828414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demodulation of vestigial sideband signals
Assignee: AT&T Inc
•
Filing: 1953-01-21
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Granted: 1958-03-25
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Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 John W Rieke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:05
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/64; E04B1/642; H; H03; H03D; H03D1/00; H03D1/22; H03D1/24; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H04B1/302; H04N; H04N5/00; H04N5/44; H04N5/455
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2066528A
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US2041855A
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US2171678A
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US2268998A
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US2231704A
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US2525089A
Cited
US2453988A
Cited
US2540333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |