US3013252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic core shift register circuits
Assignee: AT&T Inc
•
Filing: 1956-05-29
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Granted: 1961-12-12
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Expires: 1976-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick T Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:36
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2708722A
Cited
US2911621A
Cited
US2758221A
Cited
US2673337A
Cited
US2695993A
Cited
US2785390A
Cited
US2805409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |