US2996692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrahigh-frequency apparatus
Assignee: Tennessee Valley Authority
•
Filing: 1960-05-02
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Granted: 1961-08-15
•
Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 James H Christensen
- 👤 Anthony J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/20; G01R1/24; G01R1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB567287A
Cited
DE897739C
Cited
US2571055A
Cited
DE831569C
Cited
US2772402A
Cited
US2811201A
Cited
DE940051C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |