Patent US3384841A successfully refreshed from Google Patents.
US3384841A
Expired / Lapsed
US
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Ferrite phase shifter having longitudinal and circular magnetic fields applied to the ferrite
Assignee: AT&T Inc
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Filing: 1966-03-10
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Granted: 1968-05-21
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Expires: 1986-03-10
Abstract
No abstract record available.
Inventors
- 👤 Piazza Gerald C Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:51
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |