US2485576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sector antenna switching
Assignee: Federal Telecommunication Laboratories Inc
•
Filing: 1947-04-19
•
Granted: 1949-10-25
•
Expires: 1967-04-19
Abstract
No abstract record available.
Inventors
- 👤 Sven H M Dodington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/24; G; G01; G01S; G01S1/00; G01S1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1917290A
Cited
US2037865A
Cited
US2059081A
Cited
US2189317A
Cited
US2243118A
Cited
US2282526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |