Patent US2194180A successfully refreshed from Google Patents.
US2194180A
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Circuit for amplifying electrical oscillations
Assignee: RCA Corp
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Filing: 1937-10-23
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Granted: 1940-03-19
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Expires: 1957-10-23
Abstract
No abstract record available.
Inventors
- 👤 Christiaan Jan De Lussan Sablo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/04; H03F1/06; H03F1/07; H03F3/00; H03F3/20; H03F3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-03-19 | 1943-09-18 | 1944-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-19 | 1947-09-18 | 1948-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-19 | 1951-09-18 | 1952-03-19 | $7700.00 | Window Closed / Lapsed |