US3521252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory element having two thin films of differing coercive force
Assignee: KDDI Corp
•
Filing: 1966-08-09
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Granted: 1970-07-21
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Expires: 1986-08-09
Abstract
No abstract record available.
Inventors
- 👤 Shintaro Oshima
- 👤 Kitsutaro Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:02
CPC Classifications
G; G11; G11C; G11C7/00; G11C11/00; G11C11/02; G11C11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |