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US2984709A
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Magnetic head construction
Assignee: RCA Corp
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Filing: 1954-10-01
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Granted: 1961-05-16
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Expires: 1974-10-01
Abstract
No abstract record available.
Inventors
- 👤 Rettinger Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:06
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/255; G11B5/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2361753A
Cited
US2361752A
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US2531642A
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US2615990A
Cited
US2618709A
Cited
GB691505A
Cited
US2711945A
Cited
US2850582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |