US2741757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage and sensing device
Assignee: DEVOL
•
Filing: 1950-05-12
•
Granted: 1956-04-10
•
Expires: 1970-05-12
Abstract
No abstract record available.
Inventors
- 👤 George C Devol
- 👤 Erik B Hansell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:01
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2339406A
Cited
US2406870A
Cited
US2519426A
Cited
US2524154A
Cited
US2649568A
Cited
US2608621A
Cited
US2614167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |