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Patent US4722134A successfully refreshed from Google Patents.
US4722134A
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US
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Process of producing superconducting bar magnets
Assignee: Maranatha Research Ltd
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Filing: 1986-01-29
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Granted: 1988-02-02
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Expires: 2006-01-29
Abstract
Abstract A bar magnet is provided comprising a billet of superconducting material in a superconducting condition and having an established magnetic field. The bar magnet is formed by exposing the billet of superconducting material to a magnetic field of the desired extent and shape while the superconducting material is above its critical temperature. While being exposed to the magnetic field, the billet of superconducting material is lowered to its critical temperature so as to stabilize the intensity and pattern of the field. The magnetic field is them removed from the billet of material and the billet maintained at or below the critical temperature.
Inventors
- 👤 Michael A. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:11
CPC Classifications
H; H01; H01F; H01F6/00; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A method of forming a magnet having an established magnetic field comprising; (1) establishing a magnetic field of the desired extent and shape; (2) providing a superconducting material of desired shape; (3) positioning the material of (2) in field (1) while at a temperature above the critical temperature of the superconducting material so as to apply a magnetic field on the superconducting material; (4) cooling the superconducting material while in magnetic field (1) to below the critical temperature of the superconducting material; (5) removing the superconducting material from the magnetic field while in the supercooled condition; and (6) maintaining the material at or below the critical temperature.
Claim 2
Independent Claim
107 words
A method of forming a magnet having an established magnetic field comprising; (1) establishing a magnetic field of the desired extent and shape; (2) providing a superconducting material of desired shape; (3) positioning the material of (2) in field (1) while at a temperature above the critical temperature of the superconducting material so as to apply a magnetic field on the superconducting material; (4) cooling the superconducting material while in magnetic field (1) to below the critical temperature of the superconducting material; (5) removing the superconducting material from the magnetic field while in the supercooled condition; and (6) maintaining the material at or below the critical temperature.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the magnet is a bar magnet.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said magnet is a coil magnet.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein the intensity of said magnetic field is zero.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein said superconducting material is an alloy.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said superconducting material is maintained at or below the critical temperature with liquid helium.
References Cited (Backward Citations)
US3486146A
Cited
US4190817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |