US2946897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct coupled transistor logic circuits
Assignee: AT&T Inc
•
Filing: 1956-03-29
•
Granted: 1960-07-26
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 John S Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2550116A
Cited
AT162171B
Cited
US2540539A
Cited
US2815486A
Cited
US2760062A
Cited
US2806153A
Cited
FR1096793A
Cited
US2768290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |