Patent US3011031A successfully refreshed from Google Patents.
US3011031A
Expired / Lapsed
US
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Arrangement of magnetic heads for tape recorders
Assignee: Individual
•
Filing: 1956-10-08
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Granted: 1961-11-28
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Loewe Siegmund
- 👤 Zorn Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:06
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/022; G11B27/029; G11B5/00; G11B5/008; G11B5/00813; G11B5/00817; G11B5/02; G11B5/027; G11B5/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2561338A
Cited
US2700588A
Cited
US2679551A
Cited
US2793253A
Cited
US2736776A
Cited
US2751274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |