Patent US3501755A successfully refreshed from Google Patents.
US3501755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic storage matrix employing magnet cores
Assignee: US Philips Corp
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Filing: 1959-04-23
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Granted: 1970-03-17
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Expires: 1979-04-23
Abstract
No abstract record available.
Inventors
- 👤 Russell Edward Winn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:00
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/97; H03K17/972; G; G11; G11C; G11C17/00; G11C17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A MAGNETIC STORAGE DEVICE COMPRISING A PLURALITY OF MAGNETIC CORE ELEMENTS ARRANGED IN ROWS AND COLUMNS TO FORM A MATRIX IN A PLANE, SAID MAGNETIC ELEMENTS EACH BEING CONSTITUTED OF FERROMAGNETIC MATERIAL HAVING A RECTANGULAR HYSTERESIS LOOP AND POSSESSING TWO STABLE OPPOSITE REMANENCE STATES, A PAIR OF CONDUCTORS THREADED THROUGH EACH OF SAID MAGNETIC ELEMENTS, AND MEANS FOR PERMANENTLY RECORDING INFORMATION IN SAID DEVICE BY DISABLING SELECTED ELEMENTS OF THE MATRIX, SAID DISABLING MEANS INCLUDING A PLURALITY OF PERMANENT MAGNETS MOUNTED IN A PLANE PARALLEL TO THE MATRIX PLANE AND ARRANGED SUBSTANTIALLY SIMILARLY TO THE MAGNETIC ELEMENTS AND EACH CAPABLE OF PREMAGNETIZING ONE OF SAID MAGNETIC ELEMENTS WHEN IN CLOSE PROXIMITY THERETO AND THUS EFFECTIVELY REMOVING THE SAID PREMAGNETIZED ELEMENT FROM THE MATRIX, AND MEANS FOR MOVING SELECTED ONES OF THE PERMANENT MAGNETS IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE MATRIX PLANE EACH INTO THE CLOSE PROXIMITY OF ONE OF SAID SELECTED ELEMENTS.
Claim 2
Dependent Claim
153 words
A MAGNETIC STORAGE DEVICE COMPRISING A PLURALITY OF MAGNETIC CORE ELEMENTS ARRANGED IN ROWS AND COLUMNS TO FORM A MATRIX IN A PLANE, SAID MAGNETIC ELEMENTS EACH BEING CONSTITUTED OF FERROMAGNETIC MATERIAL HAVING A RECTANGULAR HYSTERESIS LOOP AND POSSESSING TWO STABLE OPPOSITE REMANENCE STATES, A PAIR OF CONDUCTORS THREADED THROUGH EACH OF SAID MAGNETIC ELEMENTS, AND MEANS FOR PERMANENTLY RECORDING INFORMATION IN SAID DEVICE BY DISABLING SELECTED ELEMENTS OF THE MATRIX, SAID DISABLING MEANS INCLUDING A PLURALITY OF PERMANENT MAGNETS MOUNTED IN A PLANE PARALLEL TO THE MATRIX PLANE AND ARRANGED SUBSTANTIALLY SIMILARLY TO THE MAGNETIC ELEMENTS AND EACH CAPABLE OF PREMAGNETIZING ONE OF SAID MAGNETIC ELEMENTS WHEN IN CLOSE PROXIMITY THERETO AND THUS EFFECTIVELY REMOVING THE SAID PREMAGNETIZED ELEMENT FROM THE MATRIX, AND MEANS FOR MOVING SELECTED ONES OF THE PERMANENT MAGNETS IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE MATRIX PLANE EACH INTO THE CLOSE PROXIMITY OF ONE OF SAID SELECTED ELEMENTS.
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) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |