US2397840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulation detector
Assignee: RCA Corp
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Filing: 1943-02-16
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Granted: 1946-04-02
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Expires: 1963-02-16
Abstract
No abstract record available.
Inventors
- 👤 Murray G Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03D; H03D3/00; H03D3/02; H03D3/06; H03D3/16; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/545
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) | 1949-04-01 | 1949-10-01 | 1950-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-01 | 1953-10-01 | 1954-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-01 | 1957-10-01 | 1958-04-02 | $7700.00 | Window Closed / Lapsed |