Patent US4565583A successfully refreshed from Google Patents.
Patent US5113164A successfully refreshed from Google Patents.
US5113164A
Expired / Lapsed
US
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Superconductors with switchable magnetic domains
Assignee: Boeing North American Inc
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Filing: 1989-01-27
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Granted: 1992-05-12
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Expires: 2009-01-27
Abstract
Abstract A tunable electromagnetic filter includes a type II superconducting medium which exhibits a permanent ferromagnetic component after exposure to a magnetic field. A magnetic field passes through the medium in a first direction, while an input conductor wound around the medium in a second direction perpendicular to the first direction receives an input signal, and an output conductor is wound around the medium in a third direction perpendicular to the first and second directions. At resonance of the medium, an alternating field magnetic component perpendicular to both the incoming signal and the magnetic field is created to induce a current of the resonant frequency in the output conductor.
Inventors
- 👤 Roger E. De Wames
- 👤 Ira B. Goldberg
- 👤 Peter E. D. Morgan
- 👤 Joseph J. Ratto
- 👤 David B. Marshall
- 👤 William F. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:14
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A tunable electromagnetic filter, comprising: a type II superconducting medium which exhibits a permanent ferromagnetic component after exposure to a magnetic field; a means for providing a magnetic field passing through the medium in a first direction; an input conductor for receiving an input signal wound around the medium in a second direction perpendicular to the first direction; an output conductor wound around the medium in a third direction perpendicular to the first and second directions, such that at resonance of the medium, an alternating field magnetic component perpendicular to both the incoming signal and the magnetic field is created to induce a current of the resonant frequency in the output conductor.
Claim 2
Dependent Claim
112 words
A tunable electromagnetic filter, comprising: a type II superconducting medium which exhibits a permanent ferromagnetic component after exposure to a magnetic field; a means for providing a magnetic field passing through the medium in a first direction; an input conductor for receiving an input signal wound around the medium in a second direction perpendicular to the first direction; an output conductor wound around the medium in a third direction perpendicular to the first and second directions, such that at resonance of the medium, an alternating field magnetic component perpendicular to both the incoming signal and the magnetic field is created to induce a current of the resonant frequency in the output conductor.
References Cited (Backward Citations)
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EP0292436A2
Cited
JPS6427409A
Cited
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US4886778A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |