US2663766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor amplifier with conjugate input and output circuits
Assignee: AT&T Inc
•
Filing: 1950-06-28
•
Granted: 1953-12-22
•
Expires: 1970-06-28
Abstract
No abstract record available.
Inventors
- 👤 Larned A Meacham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:45
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/56; H03F1/565; H03F1/08; H03F1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2003282A
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US2609459A
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US2556296A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |