US2524702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency comparison system
Assignee: RCA Corp
•
Filing: 1942-07-01
•
Granted: 1950-10-03
•
Expires: 1962-07-01
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/62; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934400A
Cited
US2104801A
Cited
US2207540A
Cited
US2177061A
Cited
US2305614A
Cited
US2377326A
Cited
US2351548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |