US2781503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory circuits employing biased magnetic binary cores
Assignee: AMF Inc
•
Filing: 1953-04-29
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Granted: 1957-02-12
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Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Norman B Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:06
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2430457A
Cited
US2683819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |