Patent US2517731A successfully refreshed from Google Patents.
US2517731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave transmission system
Assignee: RCA Corp
•
Filing: 1946-04-09
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Granted: 1950-08-08
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Expires: 1966-04-09
Abstract
No abstract record available.
Inventors
- 👤 Robert L Sproull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:38
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01Q; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054816A
Cited
US2067156A
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US2337184A
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US2408425A
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US2409227A
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US2450026A
Cited
US2444152A
Cited
US2425328A
Cited
US2380981A
Cited
US2421725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |