US2964738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hall effect memory device
Assignee: AT&T Inc
•
Filing: 1957-07-24
•
Granted: 1960-12-13
•
Expires: 1977-07-24
Abstract
No abstract record available.
Inventors
- 👤 Harold L Barney
- 👤 Fred P Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:11
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/0605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2862184A
Cited
US2649574A
Cited
US2734187A
Cited
US2736822A
Cited
US2822533A
Cited
FR1139314A
Cited
US2783456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |