US3444476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct coupled amplifier with feedback for d.c. error correction
Assignee: RCA Corp
•
Filing: 1965-03-19
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Granted: 1969-05-13
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Leidich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:37
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03F3/45484; H03F3/45488; H03F3/45533; H03F3/45542; H03F3/45076; H03F3/4508; H03F3/45085; H03F3/45493; H03F3/45511; H03F2203/00; H03F2203/45; H03F2203/45406; H03F2203/45476; H03F2203/45496; H03F2203/45498; H03F2203/45696; H03F2203/45702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929026A
Cited
US2960662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |