US3069661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory devices
Assignee: AT&T Inc
•
Filing: 1957-10-16
•
Granted: 1962-12-18
•
Expires: 1977-10-16
Abstract
No abstract record available.
Inventors
- 👤 Umberto F Gianola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:14
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/10; G11C11/04; G11C11/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2112084A
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US2706329A
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US2743507A
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US2746130A
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FR1105870A
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US2918663A
Cited
US2724103A
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US2792563A
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US2982947A
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US2811652A
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US2920317A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |