US2531122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency responsive protective arrangement for ultra high frequency systems
Assignee: General Electric Co
•
Filing: 1945-08-06
•
Granted: 1950-11-21
•
Expires: 1965-08-06
Abstract
No abstract record available.
Inventors
- 👤 Milan D Fiske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:32
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/213; H01P1/2138
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1872398A
Cited
US2408425A
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US2413171A
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US2412446A
Cited
US2403303A
Cited
US2412315A
Cited
US2425379A
Cited
US2433387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |