US2488927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable bridge transducer and its combination with a radio receiver
Assignee: RCA Corp
•
Filing: 1945-03-10
•
Granted: 1949-11-22
•
Expires: 1965-03-10
Abstract
No abstract record available.
Inventors
- 👤 James H Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:22
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/20; H04R; H04R19/00; H04R19/04; Y; Y10; Y10S; Y10S323/00; Y10S323/909
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) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |