US2647176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric amplifier with automatic gain control
Assignee: International Standard Electric Corp
•
Filing: 1951-06-06
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Granted: 1953-07-28
•
Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Daly Charles Trevor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:57
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/74; H03; H03F; H03F1/00; H03F1/52; H03F1/54; H03F1/542
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2396990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |