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US2484643A
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US
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High-frequency electronic device
Assignee: AT&T Inc
•
Filing: 1945-03-06
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Granted: 1949-10-11
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Expires: 1965-03-06
Abstract
No abstract record available.
Inventors
- 👤 Liss C Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F1/28; H01; H01J; H01J25/00; H01J25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2245627A
Cited
US2250511A
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US2338237A
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US2381320A
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US2409417A
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US2341941A
Cited
US2409222A
Cited
US2427693A
Cited
US2405611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |