Patent US3138784A successfully refreshed from Google Patents.
US3138784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superconductor guard strip gating device
Assignee: International Business Machines Corp
•
Filing: 1959-04-29
•
Granted: 1964-06-23
•
Expires: 1979-04-29
Abstract
No abstract record available.
Inventors
- 👤 John J Lentz
- 👤 David J Dumin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:02
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A SUPERCONDUCTOR GATING DEVICE COMPRISING: A PLANAR SUBSTRATE; A FIRST SUPERCONDUCTOR STRIP LAID DOWN ON SAID SAID SUBSTRATE; SAID STRIPS BEING LAID DOWN ONE ABOVE THE OTHER EXTENDING LONGITUDINALLY IN THE SAME DIRECTION ON SAID PLANAR SUBSTRATE WITH INSULATING MATERIAL THEREBETWEEN; ONE OF SAID STRIPS BEING APPRECIABLY NARROWER THAN THE OTHER OF SAID STRIPS; MEANS MAINTAINING EACH OF SAID SUPERCONDUCTIVE STRIPS AT A TEMPERATURE AT WHICH IT IS SUPERCONDUCTIVE IN THE ABSENCE OF A MAGNETIC FIELD; MEANS CONNECTED TO SAID STRIPS FOR PRODUCING CURRENT IN EITHER THE SAME DIRECTION OR OPPOSITE DIRECTIONS IN SAID STRIPS; WHEREBY SAID FIRST STRIP REMAINS SUPERCONDUCTIVE WHEN SAID CURRENTS ARE APPLIED IN OPPOSITE DIRECTIONS TO BOTH SAID STRIPS AND IS DRIVEN RESISTIVE WHEN THE CURRENTS APPLIED TO SAID STRIPS ARE IN THE SAME DIRECTION.
Claim 2
Dependent Claim
129 words
A SUPERCONDUCTOR GATING DEVICE COMPRISING: A PLANAR SUBSTRATE; A FIRST SUPERCONDUCTOR STRIP LAID DOWN ON SAID SAID SUBSTRATE; SAID STRIPS BEING LAID DOWN ONE ABOVE THE OTHER EXTENDING LONGITUDINALLY IN THE SAME DIRECTION ON SAID PLANAR SUBSTRATE WITH INSULATING MATERIAL THEREBETWEEN; ONE OF SAID STRIPS BEING APPRECIABLY NARROWER THAN THE OTHER OF SAID STRIPS; MEANS MAINTAINING EACH OF SAID SUPERCONDUCTIVE STRIPS AT A TEMPERATURE AT WHICH IT IS SUPERCONDUCTIVE IN THE ABSENCE OF A MAGNETIC FIELD; MEANS CONNECTED TO SAID STRIPS FOR PRODUCING CURRENT IN EITHER THE SAME DIRECTION OR OPPOSITE DIRECTIONS IN SAID STRIPS; WHEREBY SAID FIRST STRIP REMAINS SUPERCONDUCTIVE WHEN SAID CURRENTS ARE APPLIED IN OPPOSITE DIRECTIONS TO BOTH SAID STRIPS AND IS DRIVEN RESISTIVE WHEN THE CURRENTS APPLIED TO SAID STRIPS ARE IN THE SAME DIRECTION.
References Cited (Backward Citations)
US2189122A
Cited
US2832897A
Cited
US2980807A
Cited
US2966598A
Cited
US2930908A
Cited
US2944211A
Cited
US3022468A
Cited
US3061738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |