US3105225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for utilizing ferroelectric material for data storage
Assignee: Daystrom Inc
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Filing: 1960-03-16
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Granted: 1963-09-24
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Expires: 1980-03-16
Abstract
No abstract record available.
Inventors
- 👤 Robert L Williams
- 👤 Bill L Waddell
- 👤 Joseph W Crownover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
231 words
A FERROELECTRIC MATRIX SYSTEM COMPRISING A FERROELECTRIC MATRIX HAVING A PLURALITY OF MATRIX LEADS, MATRIX DRIVING CIRCUITRY INCLUDING FIRST, SECOND, THIRD AND FOURTH ADDRESSING LEADS AND FIRST AND SECOND DRIVING LEADS, A PLURALITY OF PULSE TRANSFORMERS COUPLING SAID DRIVING CIRCUITRY TO SAID FERROELECTRIC MATRIX, THERE BEING A PULSE TRANSFORMER CONNECTED TO EACH MATRIX LEAD, EACH TRANSFORMER HAVING A CORE THAT EXHIBITS A SUBSTANTIALLY RECTANGULAR HYSTERESIS CHARACTERISTIC, EACH PULSE TRANSFORMER HAVING THREE PRIMARY WINDINGS AND A SECONDARY WINDING, TWO OF THE PRIMARY WINDINGS OF SELECTED ONES OF SAID PULSE TRANSFORMERS BEING DIRECTLY ELECTRICALLY CONNECTED TO SAID FIRST AND SECOND ADDRESS CONTROL LEADS AND THE TWO PRIMARY WINDINGS OF THE REMAINING ONES OF SAID PULSE TRANSFORMERS BEING DIRECTLY ELECTRICALLY CONNECTED TO SAID THIRD AND FOURTH ADDRESSING LEADS, SAID FIRST DRIVING LEAD BEING DIRECTLY ELECTRICALLY CONNECTED TO THE THIRD ONE OF THE PRIMARY WINDINGS OF SAID SELECTED TRANSFORMERS, SAID SECOND DRIVING LEAD BEING DIRECTLY ELECTRICALLY CONNECTED TO THE THIRD PRIMARY WINDINGS OF SAID REMAINING PULSE TRANSFORMERS, OUTPUT CIRCUITRY CONNECTED TO EACH TRANSFORMER SECONDARY, AND MEANS ELECTRICALLY CONNECTING SAID OUTPUT CIRCUITRY TO SAID MATRIX DRIVING CIRCUITRY TO DELAY THE ENERGIZATION OF ONE OF SAID SELECTED PULSE TRANSFORMERS WITH RESPECT TO THE ENERGIZATION OF SAID REMAINING PULSE TRANSFORMERS IN RESPONSE TO THE ABSENCE OF AN OUTPUT SIGNAL PRODUCED IN SAID OUTPUT CIRCUITRY, WHEREBY THE CUMULATION EFFECT OF SUCCESSIVE PULSES APPLIED TO SAID FERROELECTRIC MATRIX IS REDUCED.
References Cited (Backward Citations)
US2918655A
Cited
US2955281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |