Patent US4490439A successfully refreshed from Google Patents.
US4490439A
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Superconductor with improved persistence characteristics
Assignee: Siemens AG
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Filing: 1984-03-22
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Granted: 1984-12-25
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Expires: 2004-03-22
Abstract
Abstract In a multifilamentary superconductor, plural filaments are separated from one another by a ductile nonsuperconducting copper matrix. The niobium titanium filaments are arrayed through the copper, with one filament being substantially larger than the others, and preferably, centrally located in the wire. Preferably also, the other filaments are arrayed in an annular configuration about the periphery of the wire.
Inventors
- 👤 Zdenek J. J. Stekly
- 👤 Bruce P. Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:30
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12486
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A composite superconductive material structure comprising: (a) a non-superconductive metal matrix; and (b) plural superconductive filaments spaced apart in predetermined longitudinal cross section within said matrix; characterized in that (c) a given one of said superconductive filaments being substantially larger in longitudinal cross section than are the others of said superconductive filaments, whereby substantially non-resistive connection maybe insured at joints of said composite material through registry across the joints at said substantially larger filaments.
Claim 2
Dependent Claim
74 words
A composite superconductive material structure comprising: (a) a non-superconductive metal matrix; and (b) plural superconductive filaments spaced apart in predetermined longitudinal cross section within said matrix; characterized in that (c) a given one of said superconductive filaments being substantially larger in longitudinal cross section than are the others of said superconductive filaments, whereby substantially non-resistive connection maybe insured at joints of said composite material through registry across the joints at said substantially larger filaments.
Claim 3
Dependent Claim
34 words
Structure as defined in claim 1 wherein said larger filament is substantially centrally located in said predetermined cross section, and wherein said other filaments are arrayed in an annular configuration surrounding said larger filament.
Claim 4
Dependent Claim
11 words
Structure as defined in claim 2 wherein said matrix is copper.
Claim 5
Dependent Claim
14 words
Structure as defined in claim 2 wherein said superconductive filaments are a niobium-titanium alloy.
References Cited (Backward Citations)
US3625662A
Cited
US4109374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |