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US5079226A Expired / Lapsed US ⏱️ 0.0 years remaining

Superconductor jointed structure

Assignee: NGK Insulators Ltd
•
Filing: 1990-03-28
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Granted: 1992-01-07
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Expires: 2010-03-28
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Abstract

Abstract A jointed structure comprising at least two kinds of oxide superconductor having different melting points, higher melting point superconductor and one lower melting point oxide superconductor being alternately jointed. In this jointed structure, the lower melting oxide superconductor is used as a joint layer for the higher melting oxide superconductors. The jointed structure can be obtained by combining an Y--Ba--Cu--O oxide superconducting material and a Bi--Sr--Ca--Cu--O oxide superconducting material, or by combining two Bi--Sr--Ca--Cu--O oxide superconducting materials of different compositions and accordingly of different melting points. Large cylindrical structures used as, for example, a container for apparatus for biomagnetism measurement can be produced by jointing two or more divided cylindrical parts. In this case, the techique of the jointed structure of the present invention can be applied for jointing of the divided cylindrical parts. The cylindrical structure produced by jointing divided cylindrical parts according to the present invention can prevent the incoming of geomagnetism, thereby enabling reliable measurement of biomagnetism.

Inventors

  • 👤 Hitoshi Sakai
  • 👤 Hitoshi Yoshida

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 05:48
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/733; Y10S505/80; Y10S505/815; Y10S505/822

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 55 words
A multisegmented jointed structure comprising a plurality of oxide superconductor segments and an oxide superconductor joint between adjacent segments, each oxide superconductor segment being an oxide superconducting composition having a melting point that is from 5° to 200° C. higher than the melting point of the oxide superconducting composition of an adjacent oxide superconductor joint.
Claim 2
Dependent Claim 55 words
A multisegmented jointed structure comprising a plurality of oxide superconductor segments and an oxide superconductor joint between adjacent segments, each oxide superconductor segment being an oxide superconducting composition having a melting point that is from 5° to 200° C. higher than the melting point of the oxide superconducting composition of an adjacent oxide superconductor joint.
Claim 3
Dependent Claim 27 words
A multisegmented structure according to claim 1, wherein each oxide superconductor segment comprises an Y--Ba--Cu--O superconducting material and each oxide superconductor joint comprises a Bi--Sr--Ca--Cu--O superconducting material.
Claim 4
Dependent Claim 40 words
A multisegmented structure according to claim 1, wherein each oxide superconductor segment comprises a Bi--Sr--Ca--Cu--O oxide superconducting material and each oxide superconductor joint comprises a composition obtained by incorporating a noble metal or Pb into a Bi--Sr--Ca--Cu--O oxide superconducting material.
Claim 5
Dependent Claim 25 words
A multisegmented jointed structure according to claim 3, wherein the Bi13 Sr--Ca--Cu--O oxide superconducting material is Bi 2 Sr 2 CaCu 2 O x .
Claim 6
Dependent Claim 16 words
A multisegmented jointed structure according to claim 3, wherein the noble metal is Au or Ag.
Claim 7
Dependent Claim 32 words
A multisegmented structure according to any one of claims 1, 2 and 3, wherein each oxide superconductor segment is a metal substrate having a layer of the oxide superconducting composition formed thereon.
Claim 8
Dependent Claim 27 words
A multisegmented structure according to any one of claims 1, 2 and 3, wherein each oxide superconductor segment and each oxide superconductor joint has a cylindrical shape.
Claim 9
Dependent Claim 21 words
A multisegmented structure according to claim 6, wherein each oxide superconductor segment and each oxide superconductor joint has a cylindrical shape.
Claim 10
Dependent Claim 25 words
A multisegmented structure according to claim 7, wherein each oxide superconductor segment has a length of 1/10 or more of the diameter of the cylinder.
Claim 11
Dependent Claim 25 words
A multisegmented structure according to claim 8, wherein each oxide superconductor segment has a length of 1/10 or more of the diameter of the cylinder.
Claim 12
Dependent Claim 24 words
A multisegmented structure according to claim 7, wherein each oxide superconductor joint is a hollow cylinder having a thickness of 2 mm or less.
Claim 13
Dependent Claim 24 words
A multisegmented structure according to claim 8, wherein each oxide superconductor joint is a hollow cylinder having a thickness of 2 mm or less.
Claim 14
Dependent Claim 51 words
A multisegmented jointed structure according to any one of claims 1, 2 and 3 wherein each oxide superconductor segment comprises an oxide superconducting composition having a melting point that is from 10° to 100° C. higher than the melting point of the oxide superconducting composition of an adjacent oxide superconductor joint.

References Cited (Backward Citations)

US4336958A Cited
US4861751A Cited
EP0371462A2 Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1995-01-06 1995-07-08 1996-01-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1999-01-06 1999-07-08 2000-01-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2003-01-06 2003-07-08 2004-01-07 $7700.00 Window Closed / Lapsed

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