Patent US3244974A successfully refreshed from Google Patents.
US3244974A
Expired / Lapsed
US
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Superconductive device for detecting magnetic field intensities
Assignee: International Business Machines Corp
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Filing: 1962-05-22
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Granted: 1966-04-05
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Expires: 1982-05-22
Abstract
No abstract record available.
Inventors
- 👤 David J Dumin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:09
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/035; H; H10; H10N; H10N60/00; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/842; Y10S505/843; Y10S505/845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A DEVICE FOR CONCENTRATING AND DETECTING MAGNETIC FIELDS WHICH COMPRISES: (A) A SHEET OF SUPERCONDUCTIVE MATERIAL, (B) A GATE ELEMENT ADJACENT TO AT LEAST ONE EDGE OF SAID SHEET, ELECTRICALLY INSULATED THEREFROM AND LYING WITHIN SUBSTANTIALLY ALL LINES OF FLUX WHICH PASS AROUND SAID ONE EDGE OF SAID SHEET BY VIRTUE OF THE DIAMAGNETIC PROPERTIES THEREOF, (C) A VARIABLE DIRECT CURRENT POWER SUPPLY CONNECTED TO OPPOSITE ENDS OF SAID GATE ELEMENT, (D) DETECTION MEANS OPERATIVELY CONNECTED TO SAID GATE ELEMENT FOR DETERMINING CURRENT FLOW THROUGH AND THE SWITCHING CHARACTERISTICS OF SAID GATE ELEMENT AND, (E) MEANS FOR MAINTAINING SAID DEVICE AT SUPERCONDUCTIVE TEMPERATURES.
Claim 2
Independent Claim
103 words
A DEVICE FOR CONCENTRATING AND DETECTING MAGNETIC FIELDS WHICH COMPRISES: (A) A SHEET OF SUPERCONDUCTIVE MATERIAL, (B) A GATE ELEMENT ADJACENT TO AT LEAST ONE EDGE OF SAID SHEET, ELECTRICALLY INSULATED THEREFROM AND LYING WITHIN SUBSTANTIALLY ALL LINES OF FLUX WHICH PASS AROUND SAID ONE EDGE OF SAID SHEET BY VIRTUE OF THE DIAMAGNETIC PROPERTIES THEREOF, (C) A VARIABLE DIRECT CURRENT POWER SUPPLY CONNECTED TO OPPOSITE ENDS OF SAID GATE ELEMENT, (D) DETECTION MEANS OPERATIVELY CONNECTED TO SAID GATE ELEMENT FOR DETERMINING CURRENT FLOW THROUGH AND THE SWITCHING CHARACTERISTICS OF SAID GATE ELEMENT AND, (E) MEANS FOR MAINTAINING SAID DEVICE AT SUPERCONDUCTIVE TEMPERATURES.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |