US3281802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic memory core
Assignee: Massachusetts Institute of Technology
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Filing: 1964-11-27
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Granted: 1966-10-25
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Robert E Mcmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:04
CPC Classifications
H; H03; H03K; H03K25/00; G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/06021; G11C11/06028; G11C11/06042; G11C11/0605; G11C11/06057; G11C11/06071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A MAGNETIC CORE STORAGE ELEMENT COMPRISING A MAGNETIC CORE HAVING SQUARE LOOP HYSTERESIS PROPERTIES, A FIRST MEANS FOR APPLYING TO SAID CORE A FIRST MAGNETIZING FORCE INSUFFICIENT TO SWITCH SAID CORE, A SECOND MEANS FOR APPLYING TO SAID CORE A SECOND MAGNETIZING FORCE SUFFICIENT TO SWITCH SAID CORE, MEANS FOR PRODUCING TIME COINCIDENCE OF SAID FIRST AND SECOND MAGNETIZING FORCES, SAID SECOND MAGNETIZING FORCE DURATION BEING SHORTER THAN THE TIME REQUIRED FOR SAID FIRST AND SECOND TIME COINCIDENT FORCES TO COMPLETELY SWITCH THE FLUX IN SAID CORE, SAID COINCIDENCE OF SAID MAGNETIZING FORCES PRODUCES A CHANGE IN FLUX IN SAID CORE OF GREATER MAGNITUDE THAN THAT PRODUCED BY SAID SECOND FORCE ACTING ALONE.
Claim 2
Dependent Claim
113 words
A MAGNETIC CORE STORAGE ELEMENT COMPRISING A MAGNETIC CORE HAVING SQUARE LOOP HYSTERESIS PROPERTIES, A FIRST MEANS FOR APPLYING TO SAID CORE A FIRST MAGNETIZING FORCE INSUFFICIENT TO SWITCH SAID CORE, A SECOND MEANS FOR APPLYING TO SAID CORE A SECOND MAGNETIZING FORCE SUFFICIENT TO SWITCH SAID CORE, MEANS FOR PRODUCING TIME COINCIDENCE OF SAID FIRST AND SECOND MAGNETIZING FORCES, SAID SECOND MAGNETIZING FORCE DURATION BEING SHORTER THAN THE TIME REQUIRED FOR SAID FIRST AND SECOND TIME COINCIDENT FORCES TO COMPLETELY SWITCH THE FLUX IN SAID CORE, SAID COINCIDENCE OF SAID MAGNETIZING FORCES PRODUCES A CHANGE IN FLUX IN SAID CORE OF GREATER MAGNITUDE THAN THAT PRODUCED BY SAID SECOND FORCE ACTING ALONE.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |