Patent US4330347A successfully refreshed from Google Patents.
US4330347A
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US
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Resistive coating for current conductors in cryogenic applications
Assignee: United States Department of Energy
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Filing: 1980-01-28
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Granted: 1982-05-18
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Expires: 2000-01-28
Abstract
Abstract This invention relates to a resistive or semiconducting coating for use on current conductors in cryogenic applications. This includes copper-clad superconductor wire, copper wire used for stabilizing superconductor magnets, and for hyperconductors. The coating is a film of cuprous sulfide (Cu 2 S) that has been found not to degrade the properties of the conductors. It is very adherent to the respective conductors and satisfies the mechanical, thermal and electrical requirements of coatings for the conductors.
Inventors
- 👤 Chikara Hirayama
- 👤 George R. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:47
CPC Classifications
H; H01; H01B; H01B12/00; H01B12/02; Y; Y02; Y02E; Y02E40/00; Y02E40/60; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S72/00; Y10S72/70; Y10T; Y10T428/00; Y10T428/12; Y10T428/12465; Y10T428/12486; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1266; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12819; Y10T428/12861; Y10T428/12903; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A superconducting article comprising: a matrix core containing a superconductor; a copper-containing cladding disposed about said core; and an adherent coating of copper sulfide formed on the outer surface of said cladding which is electrically insulating at cryogenic temperatures.
Claim 2
Dependent Claim
39 words
A superconducting article comprising: a matrix core containing a superconductor; a copper-containing cladding disposed about said core; and an adherent coating of copper sulfide formed on the outer surface of said cladding which is electrically insulating at cryogenic temperatures.
Claim 3
Dependent Claim
18 words
The article of claim 1 wherein said coating is Cu 2-x S, where x is less than 0.5.
Claim 4
Dependent Claim
21 words
The article of claim 2 wherein said layer has a uniform thickness in the range of from 1.5 to 20 μm.
References Cited (Backward Citations)
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |