US2425922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency discriminator circuit
Assignee: RCA Corp
•
Filing: 1943-04-15
•
Granted: 1947-08-19
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Expires: 1963-04-15
Abstract
No abstract record available.
Inventors
- 👤 Murray G Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:44
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H03J7/042; 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)
US2172732A
Cited
GB469077A
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US2129085A
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US2243417A
Cited
US2282971A
Cited
US2233199A
Cited
US2266052A
Cited
US2320175A
Cited
US2376127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |