US3095555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory element
Assignee: Unisys Corp
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Filing: 1961-02-13
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Granted: 1963-06-25
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Richard L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:49
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/14; H; H01; H01F; H01F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A MAGNETIC MEMORY ELEMENT PROVIDING NONDESTRUCTIVE READOUT OF A MAGNETIC CORE COMPRISING THREE MAGNETIC FILM CORES EACH CORE HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTIC, A FIRST CORE HAVING A HIGH COERCIVITY AND INITIALLY PERMANENTLY MAGNETIZED IN ONE OF ITS TWO REMANENT MAGNETIC STATES, A SECOND CORE HAVING A RELATIVELY LOW COERCIVITY, A THIRD CORE HAVING A RELATIVELY INTERMEDIATE COERCIVITY, SAID FIRST AND THIRD CORES HAVING SUBSTANTIAL EXTERNAL REMANENT MAGNETIC FIELDS IN THE AREA OF SAID SECOND CORE WITH THE FIELD OF SAID FIRST CORE BEING OF EQUAL OR GREATER INTENSITY THAN THAT OF SAID THIRD CORE.
Claim 2
Dependent Claim
96 words
A MAGNETIC MEMORY ELEMENT PROVIDING NONDESTRUCTIVE READOUT OF A MAGNETIC CORE COMPRISING THREE MAGNETIC FILM CORES EACH CORE HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTIC, A FIRST CORE HAVING A HIGH COERCIVITY AND INITIALLY PERMANENTLY MAGNETIZED IN ONE OF ITS TWO REMANENT MAGNETIC STATES, A SECOND CORE HAVING A RELATIVELY LOW COERCIVITY, A THIRD CORE HAVING A RELATIVELY INTERMEDIATE COERCIVITY, SAID FIRST AND THIRD CORES HAVING SUBSTANTIAL EXTERNAL REMANENT MAGNETIC FIELDS IN THE AREA OF SAID SECOND CORE WITH THE FIELD OF SAID FIRST CORE BEING OF EQUAL OR GREATER INTENSITY THAN THAT OF SAID THIRD CORE.
References Cited (Backward Citations)
US2960685A
Cited
GB845604A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |