US2964651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical circuit employing transistor
Assignee: AT&T Inc
•
Filing: 1956-03-29
•
Granted: 1960-12-13
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:32
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2644893A
Cited
US2835828A
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US2809239A
Cited
FR1116599A
Cited
US2762921A
Cited
US2762920A
Cited
US2802118A
Cited
US2774878A
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 |