US2270764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier coupling circuit
Assignee: General Electric Co
•
Filing: 1940-04-05
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Granted: 1942-01-20
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Expires: 1960-04-05
Abstract
No abstract record available.
Inventors
- 👤 Donald E Norgaard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:34
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H03F1/42; H03F1/48; H03F1/50
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) | 1945-01-19 | 1945-07-21 | 1946-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-19 | 1949-07-21 | 1950-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-19 | 1953-07-21 | 1954-01-20 | $7700.00 | Window Closed / Lapsed |