US2961494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head assemblies
Assignee: Laboratory For Electronics Inc
•
Filing: 1956-05-25
•
Granted: 1960-11-22
•
Expires: 1976-05-25
Abstract
No abstract record available.
Inventors
- 👤 Jr William T Darou
- 👤 William J Gorman
- 👤 James F Metcalf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:54
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/50; G11B5/00; G11B5/127; G11B5/17; G11B5/40; G11B5/48; G11B5/52; G11B5/53; G11B5/58; G11B5/60; G11B5/6005; G11B5/74; G11B5/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2536272A
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US2721743A
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US2761016A
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US2813932A
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US2647755A
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US2785232A
Cited
US2673249A
Cited
US2769037A
Cited
US2772135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |