US3217389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making magnetic transducer heads
Assignee: Clevite Corp
•
Filing: 1962-02-28
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Granted: 1965-11-16
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Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
- 👤 Donald F Neumann
- 👤 Blumenthal John
- 👤 Robert S Vance
- 👤 Edward C Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/29; G11B5/295; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49055; Y10T29/49059; Y10T29/49073
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2915812A
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US2928907A
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US3120696A
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US2888522A
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US3069755A
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US3080642A
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US3064333A
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US3114196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |