Patent US3519498A successfully refreshed from Google Patents.
US3519498A
Expired / Lapsed
US
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Ferromagnetic film
Assignee: International Business Machines Corp
•
Filing: 1966-07-14
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Granted: 1970-07-07
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Expires: 1986-07-14
Abstract
No abstract record available.
Inventors
- 👤 Kie Y Ahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C22; C22C; C22C19/00; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1873155A
Cited
US1838130A
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US3117896A
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US3124490A
Cited
US3102048A
Cited
US3287108A
Cited
US3303116A
Cited
US3399129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |