US2994045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical transmission devices utilizing gyromagnetic ferrites
Assignee: AT&T Inc
•
Filing: 1955-04-11
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Granted: 1961-07-25
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Expires: 1975-04-11
Abstract
No abstract record available.
Inventors
- 👤 Le Grand G Van Uitert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625; H; H01; H01P; H01P1/00; H01P1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1976230A
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US2576456A
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US2644930A
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US2685568A
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FR1031530A
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GB717269A
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US2736708A
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US2719274A
Cited
GB721630A
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FR1080515A
Cited
US2723239A
Cited
FR1086346A
Cited
US2860105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |