Patent US2994828A successfully refreshed from Google Patents.
US2994828A
Expired / Lapsed
US
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Limiting in-phase, but not quadrature, sideband of a strong carrier by selective loading action of a diode modulator at the termination of a branching network
Assignee: AT&T Inc
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Filing: 1959-07-13
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Granted: 1961-08-01
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Clyde L Ruthroff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/02; H03C3/04; H03D; H03D9/00; H03D9/02; H03D9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |