US2912518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape apparatus
Assignee: Ampex Corp
•
Filing: 1956-01-24
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Granted: 1959-11-10
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Expires: 1976-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alexander R Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:28
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G11B15/00; G11B15/18; G11B15/26; G11B15/28; G11B15/29; G11B15/60; G11B15/61; G11B15/62
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |