US2611833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric amplifier with negative feedback
Assignee: International Standard Electric Corp
•
Filing: 1947-02-07
•
Granted: 1952-09-23
•
Expires: 1967-02-07
Abstract
No abstract record available.
Inventors
- 👤 Roche Alleman Holly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:51
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/06; H04B3/08; H03; H03F; H03F1/00; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2151829A
Cited
US2178072A
Cited
US2350951A
Cited
US2468082A
Cited
US2367711A
Cited
US2428363A
Cited
US2432033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |