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US2982948A
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Multi-material ferrite cores
Assignee: International Business Machines Corp
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Filing: 1957-11-01
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Granted: 1961-05-02
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Expires: 1977-11-01
Abstract
No abstract record available.
Inventors
- 👤 James M Brownlow
- 👤 Ernest C Schuenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:51
CPC Classifications
H; H01; H01F; H01F3/00; H01F3/10; C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625; H01F2003/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2452531A
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US2691156A
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US2847639A
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US2709248A
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US2829338A
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US2805408A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |