US2956180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse shift monitoring circuit
Assignee: AT&T Inc
•
Filing: 1958-06-26
•
Granted: 1960-10-11
•
Expires: 1978-06-26
Abstract
No abstract record available.
Inventors
- 👤 Dennis B James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/28; H; H03; H03K; H03K23/00; H03K23/40; H03K23/50; H03K23/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2715678A
Cited
US2719959A
Cited
US2696599A
Cited
US2744955A
Cited
US2769971A
Cited
US2724104A
Cited
US2840708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |