US2522863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency-modulation distance finder
Assignee: RCA Corp
•
Filing: 1945-11-15
•
Granted: 1950-09-19
•
Expires: 1965-11-15
Abstract
No abstract record available.
Inventors
- 👤 Murray G Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34; G01S13/345
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21955E
Cited
US2268587A
Cited
US2423644A
Cited
GB542634A
Cited
US2417815A
Cited
US2407169A
Cited
US2351240A
Cited
US2416351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |