Patent US2988294A successfully refreshed from Google Patents.
US2988294A
Expired / Lapsed
US
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Magnetic tape apparatus
Assignee: Ampex Corp
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Filing: 1959-08-13
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Granted: 1961-06-13
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Expires: 1979-08-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Neff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:30
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/08; G06; G06K; G06K13/00; G06K13/18; G06K13/26; G06K13/28; G11; G11B; G11B15/00; G11B15/02; G11B15/16; G11B15/18; G11B15/26; G11B15/28; G11B15/295; G11B15/43; G11B15/60
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |