US3281609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic supercurrent tunneling devices
Assignee: AT&T Inc
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Filing: 1964-01-17
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Granted: 1966-10-25
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Expires: 1984-01-17
Abstract
No abstract record available.
Inventors
- 👤 John M Rowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/195; H03K19/1952; H03K19/1954; H03K19/1956; H10; H10N; H10N60/00; H10N60/10; H10N60/12; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857; Y10S505/86; Y10S505/861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A SUPERCURRENT TUNNEL JUNCTION DEVICE COMPRISING A PAIR OF SUPERCONDUCTORS SEPARATED BY MEANS OF AN INSULATING LAYER THAT IS SUFFICIENTLY THIN TO PERMIT SUPERCURRENT TUNNELING THERETHROUGH, SAID JUNCTION HAVING HYSTERETIC CURRENT-VOLTAGE CHARACTERISTIC INCLUDING A REGION OF INCREASING CURRENT AT ZERO VOLTAGE AND A CRITICAL TUNNELING SUPERCURRENT AT WHICH THE JUNCTION VOLTAGE ABRUPTLY INCREASES FROM SAID ZERO VOLTAGE TO SOME FINITE HIGHER VALUE, AND INCLUDING A REGION OF DECREASING CURRENT LESS THAN SAID CRITICAL CURRENT AT WHICH SAID JUNCTION VOLTAGE ABRUPTLY DECREASES FROM SUBSTANTIALLY END FINITE VALUE TO ZERO VOLTAGER, FIRST AND SECOND CURRENT SOURCES FOR APPLYING CURRENT TO SAID JUNCTION WHOSE AMPLITUDE VARIES FROM GREATER THAN SAID CRITICAL CURRENT TO LESS THAN SAID CURRENT AT WHICH SAID VOLTAGE SWITCHES FROM SUBSTANTIALLY SAID FINITE VALUE TO ZERO, AND AN OUTPUT CIRCUIT CONNECTED ACROSS SAID JUNCTION.
Claim 2
Dependent Claim
134 words
A SUPERCURRENT TUNNEL JUNCTION DEVICE COMPRISING A PAIR OF SUPERCONDUCTORS SEPARATED BY MEANS OF AN INSULATING LAYER THAT IS SUFFICIENTLY THIN TO PERMIT SUPERCURRENT TUNNELING THERETHROUGH, SAID JUNCTION HAVING HYSTERETIC CURRENT-VOLTAGE CHARACTERISTIC INCLUDING A REGION OF INCREASING CURRENT AT ZERO VOLTAGE AND A CRITICAL TUNNELING SUPERCURRENT AT WHICH THE JUNCTION VOLTAGE ABRUPTLY INCREASES FROM SAID ZERO VOLTAGE TO SOME FINITE HIGHER VALUE, AND INCLUDING A REGION OF DECREASING CURRENT LESS THAN SAID CRITICAL CURRENT AT WHICH SAID JUNCTION VOLTAGE ABRUPTLY DECREASES FROM SUBSTANTIALLY END FINITE VALUE TO ZERO VOLTAGER, FIRST AND SECOND CURRENT SOURCES FOR APPLYING CURRENT TO SAID JUNCTION WHOSE AMPLITUDE VARIES FROM GREATER THAN SAID CRITICAL CURRENT TO LESS THAN SAID CURRENT AT WHICH SAID VOLTAGE SWITCHES FROM SUBSTANTIALLY SAID FINITE VALUE TO ZERO, AND AN OUTPUT CIRCUIT CONNECTED ACROSS SAID JUNCTION.
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 |