Patent US3071755A successfully refreshed from Google Patents.
US3071755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic cores
Assignee: Unisys Corp
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Filing: 1958-06-05
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Granted: 1963-01-01
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Expires: 1978-06-05
Abstract
No abstract record available.
Inventors
- 👤 John H Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:10
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/14; H01F10/26; H01F10/265; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A BISTABLE MAGNETIC ELEMENT COMPRISING A FILM-LIKE SHEET OF NON-MAGNETIC ELECTRICALLY INSULATING MATERIAL SPIRALLY WOUND WITH THE LAYERS CONTIGUOUS TO ONE ANOTHER, A MAGNETIC MATERIAL HAVING SUBSTANTIALLY SQUARE SHAPED
Claim 2
Dependent Claim
29 words
A BISTABLE MAGNETIC ELEMENT COMPRISING A FILM-LIKE SHEET OF NON-MAGNETIC ELECTRICALLY INSULATING MATERIAL SPIRALLY WOUND WITH THE LAYERS CONTIGUOUS TO ONE ANOTHER, A MAGNETIC MATERIAL HAVING SUBSTANTIALLY SQUARE SHAPED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |