US2863126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered wave guide delay equalizer
Assignee: AT&T Inc
•
Filing: 1953-12-31
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Granted: 1958-12-02
•
Expires: 1973-12-31
Abstract
No abstract record available.
Inventors
- 👤 John R Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:15
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/142; H01; H01P; H01P1/00; H01P1/18; H01P1/182; H01P9/00; H01P9/003; H03; H03K; H03K5/00; H03K5/01; H03K5/04; H03K5/06; H03K5/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB650614A
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US2438915A
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US2547412A
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US2444060A
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US2602895A
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US2514779A
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US2510288A
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US2643296A
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US2649576A
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US2676306A
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US2767379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |