US3480922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic film device
Assignee: International Business Machines Corp
•
Filing: 1965-05-05
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Granted: 1969-11-25
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Expires: 1985-05-05
Abstract
No abstract record available.
Inventors
- 👤 Barry L Flur
- 👤 Pieter D Davidse
- 👤 Leon I Maissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:50
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/10; C23C14/22; C23C14/34; G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/7368; G11B5/739; G11B5/73911; G11B5/73917; H; H01; H01F; H01F10/00; H01F10/26; H01F10/28; H01F10/30
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) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |