Patent US3078447A successfully refreshed from Google Patents.
US3078447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coincident flux memory device
Assignee: AT&T Inc
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Filing: 1961-03-31
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Granted: 1963-02-19
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond W Ketchledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:30
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A MAGNETIC CORE MEMORY DEVICE COMPRISING AT LEAST TWO CLOSED PATHS OF MAGNETIC MATERIAL, A MAGNETIC MEMBER HAVING TWO STABLE MAGNETIZATION STATES, EACH OF SAID PATHS INCLUDING SAID MEMBER THEREIN, THE REMAINDER OF SAID PATHS BEING OF MAGNETICALLY SOFT MATERIAL AND COMPRISING NO OTHER MUTUAL PARTS, AND A PLURALITY OF MEANS FOR APPLYING MAGNETOMOTIVE FORCES IN OPPOSITE DIRECTIONS AROUND EACH OF SAID PATHS, SAID MEMBER HAVING A RELUCTANCE GREAT ENOUGH TO PREVENT A CHANGE IN ITS MAGNETIZATION STATE IN THE ABSENCE OF THE SIMULTANEOUS OPERATION OF SAID PLURALITY OF MAGNETOMOTIVE FORCE APPLICATION MEANS.
Claim 2
Dependent Claim
93 words
A MAGNETIC CORE MEMORY DEVICE COMPRISING AT LEAST TWO CLOSED PATHS OF MAGNETIC MATERIAL, A MAGNETIC MEMBER HAVING TWO STABLE MAGNETIZATION STATES, EACH OF SAID PATHS INCLUDING SAID MEMBER THEREIN, THE REMAINDER OF SAID PATHS BEING OF MAGNETICALLY SOFT MATERIAL AND COMPRISING NO OTHER MUTUAL PARTS, AND A PLURALITY OF MEANS FOR APPLYING MAGNETOMOTIVE FORCES IN OPPOSITE DIRECTIONS AROUND EACH OF SAID PATHS, SAID MEMBER HAVING A RELUCTANCE GREAT ENOUGH TO PREVENT A CHANGE IN ITS MAGNETIZATION STATE IN THE ABSENCE OF THE SIMULTANEOUS OPERATION OF SAID PLURALITY OF MAGNETOMOTIVE FORCE APPLICATION MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |