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Patent US3418642A successfully refreshed from Google Patents.
US3418642A
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Dual control memory modules for self-searching memory
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1961-05-15
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Granted: 1968-12-24
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Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 Paul M Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:55
CPC Classifications
G; G11; G11C; G11C15/00; G11C15/06; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/831; Y10S505/833; Y10S505/834; Y10S505/835
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
IN COMBINATION, A MEMORY MODULE HAVING A PLURALITY OF INDIVIDUAL BIT HANDLING SEGMENTS, EACH BIT HANDLING SEGMENT HAVING A SINGLE INPUT FOR WRITING INFORMATION AND A SINGLE OUTPUT LINE FOR READING INFORMATION, A PERSISTOR CIRCUIT CONNECTED TO SAID INPUT LINE FOR STORING INFORMATION IN THE FORM OF A CIRCULATING CURRENT, SAID PERSISTOR CIRCUIT BEING RESPONSIVE TO INTERROGATING SIGNALS FOR GENERATING A ZERO CURRENT IN A PORTION OF SAID PERSISTOR LOOP IN THE PRESENCE OF A TRUE COMPARISON BETWEEN SAID CIRCULATING CURRENT AND SAID INTERROGATING SIGNAL, A DUAL CONTROL SUPERCONDUCTIVE DEVICE RESPONSIVE TO SAID ZERO CURRENT FOR INDICATING A TRUE COMPARISON, AND A SUPERCONDUCTING DEVICE LOCATED IN SAID OUTPUT LINE RESPONSIVE TO SAID DETECTING LINE AND CURRENT IN SAID PERSISTOR CIRCUIT FOR READING INFORMATION INTO SAID OUTPUT LINE.
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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |