Patent US2964656A successfully refreshed from Google Patents.
US2964656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistorized bipolar amplifier
Assignee: AT&T Inc
•
Filing: 1958-06-11
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Granted: 1960-12-13
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Expires: 1978-06-11
Abstract
No abstract record available.
Inventors
- 👤 Henry M Bissell
- 👤 Zarouni Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:42
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2490045A
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US2670445A
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US2760087A
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US2791644A
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US2675538A
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US2782267A
Cited
US2702854A
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US2794123A
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US2864961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |