Patent US2449174A successfully refreshed from Google Patents.
US2449174A
Expired / Lapsed
US
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Antenna supply phase and amplitude control
Assignee: Decca Record Co Ltd
•
Filing: 1942-04-13
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Granted: 1948-09-14
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Expires: 1962-04-13
Abstract
No abstract record available.
Inventors
- 👤 William J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:04
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |