US2270539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intertube intermediate-frequency coupling system
Assignee: BAE Systems Aerospace Inc
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Filing: 1940-04-18
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Granted: 1942-01-20
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Expires: 1960-04-18
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Malling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/4446; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/0169; H04N7/00; H04N7/06; H03H7/17; H03H7/1741; H03H7/1791
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) | 1945-01-19 | 1945-07-21 | 1946-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-19 | 1949-07-21 | 1950-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-19 | 1953-07-21 | 1954-01-20 | $7700.00 | Window Closed / Lapsed |