Patent US1745342A successfully refreshed from Google Patents.
US1745342A
Expired / Lapsed
US
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Directive-projecting system of electric waves
Assignee: RCA Corp
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Filing: 1926-09-03
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Granted: 1930-01-28
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Expires: 1946-09-03
Abstract
No abstract record available.
Inventors
- 👤 Yagi Hidetsugu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/28; H01Q19/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-01-27 | 1933-07-29 | 1934-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-01-27 | 1937-07-29 | 1938-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-01-27 | 1941-07-29 | 1942-01-28 | $7700.00 | Window Closed / Lapsed |