US3365709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High permeability magnetic head assembly
Assignee: Ampex Corp
•
Filing: 1963-12-16
•
Granted: 1968-01-23
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Beverly R Gooch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:51
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/10; G11B5/105; G11B5/11; G11B5/127; G11B5/147; G11B5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2850582A
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US2888522A
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US3000078A
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US2886652A
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US3303292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |