Patent US3218616A successfully refreshed from Google Patents.
US3218616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistive readout of thinfilm memories
Assignee: US Philips Corp
•
Filing: 1962-07-13
•
Granted: 1965-11-16
•
Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 Huijer Pieter
- 👤 Pit Hugo Frans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:54
CPC Classifications
G; G11; G11C; G11C7/00; G11C7/02; G11C11/00; G11C11/02; G11C11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
232 words
A MEMORY SYSTEM COMPRISING A PLURALITY OF MEMORY ELEMENTS CONSISTING OF CONDUCTIVE MAGNETIC MATERIAL HAVING A SUBTANTIALLY RECTANGULAR HYSTERISIS CURVE, EACH OF SAID ELEMENTS BEING IN THE FORM OF A THIN FILM WITH A PREFERENTIAL ORIENTATION OF THE MAGENITIZATION IN THE PLANE OF THE FILM, SAID ELEMENTS BEING ARRANGED IN THE FORM OF A MATRIX HAVING A PLURALITY OF ROWS AND COLUMNS, A PLURALITY OF HORIZONTAL CONDUCTOR MEANS EACH BEING INDUCTIVELY COUPLED TO A PARTICULAR ROW, A PLURALITY OF VERTICAL CONDUCTOR MEANS EACH BEING INDUCTIVELY COUPLED TO A PARTICULAR COLUMN, MEANS FOR SUPPLYING PULSES OF A PREDETERMINED MAGNITUDE TO SELECTED ONES OF SAID HORIZONTAL AND VERTICAL CONDUCTORS FOR SUPPLYING INFORMATION TO A SELECTED ELEMENT, A PLURALITY OF ELECTRICALLY CONDUCTIVE MEANS EACH BEING CONDUCTIVELY CONNECTED TO AT LEAST ONE OF SAID ELEMENTS, EACH CONDUCTIVE MEANS CONDUCTIVELY INTERCONNECTING IN SERIES SUCCESSIVE ELEMENTS OF A SINGLE ROW OR COLUMN, MEANS FOR TEMPORARILY SUPPLYING A SUBSTANTIALLY CONSTANT CURRENT TO THE SUCCESSIVE ELEMENTS OF A SELECTED ROW OF COLUMN THROUGH SAID CONDUCTIVE MEANS AND MEANS FOR APPLYING A READ-OUT PULSE A PREDETERMINED MAGNITUDE TO A SELECTED ONE OF SAID CONDUCTORS DURING THE TIME THAT SAID CONSTANT CURRENT IS SUPPLIED FOR READING OUT INFORMATION IN A SELECTED ELEMENT, AND DETECTING MEANS FOR DETECTING THE CHANGE OF SAID CURRENT DUE TO THE APPLICATION OF SAID READ-OUT PULSE, SAID DETECTING MEANS BEING COUPLED TO ALL OF THE CONDUCTIVELY INTERCONNECTED ELEMENTS.
Claim 2
Dependent Claim
232 words
A MEMORY SYSTEM COMPRISING A PLURALITY OF MEMORY ELEMENTS CONSISTING OF CONDUCTIVE MAGNETIC MATERIAL HAVING A SUBTANTIALLY RECTANGULAR HYSTERISIS CURVE, EACH OF SAID ELEMENTS BEING IN THE FORM OF A THIN FILM WITH A PREFERENTIAL ORIENTATION OF THE MAGENITIZATION IN THE PLANE OF THE FILM, SAID ELEMENTS BEING ARRANGED IN THE FORM OF A MATRIX HAVING A PLURALITY OF ROWS AND COLUMNS, A PLURALITY OF HORIZONTAL CONDUCTOR MEANS EACH BEING INDUCTIVELY COUPLED TO A PARTICULAR ROW, A PLURALITY OF VERTICAL CONDUCTOR MEANS EACH BEING INDUCTIVELY COUPLED TO A PARTICULAR COLUMN, MEANS FOR SUPPLYING PULSES OF A PREDETERMINED MAGNITUDE TO SELECTED ONES OF SAID HORIZONTAL AND VERTICAL CONDUCTORS FOR SUPPLYING INFORMATION TO A SELECTED ELEMENT, A PLURALITY OF ELECTRICALLY CONDUCTIVE MEANS EACH BEING CONDUCTIVELY CONNECTED TO AT LEAST ONE OF SAID ELEMENTS, EACH CONDUCTIVE MEANS CONDUCTIVELY INTERCONNECTING IN SERIES SUCCESSIVE ELEMENTS OF A SINGLE ROW OR COLUMN, MEANS FOR TEMPORARILY SUPPLYING A SUBSTANTIALLY CONSTANT CURRENT TO THE SUCCESSIVE ELEMENTS OF A SELECTED ROW OF COLUMN THROUGH SAID CONDUCTIVE MEANS AND MEANS FOR APPLYING A READ-OUT PULSE A PREDETERMINED MAGNITUDE TO A SELECTED ONE OF SAID CONDUCTORS DURING THE TIME THAT SAID CONSTANT CURRENT IS SUPPLIED FOR READING OUT INFORMATION IN A SELECTED ELEMENT, AND DETECTING MEANS FOR DETECTING THE CHANGE OF SAID CURRENT DUE TO THE APPLICATION OF SAID READ-OUT PULSE, SAID DETECTING MEANS BEING COUPLED TO ALL OF THE CONDUCTIVELY INTERCONNECTED 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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |