Patent US2929670A successfully refreshed from Google Patents.
US2929670A
Expired / Lapsed
US
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Apparatus for producing magnetic records on tape
Assignee: International Business Machines Corp
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Filing: 1958-11-12
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Granted: 1960-03-22
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Garrity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/187; G11B5/245; G11B5/2452; G11B5/48; G11B5/49; G11B5/4969
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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |