US5294600A
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Superconducting material comprising Rbx Csy C60.
Assignee: NEC Corp
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Filing: 1992-07-02
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Granted: 1994-03-15
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Expires: 2012-07-02
Abstract
Abstract A superconducting material higher in superconducting transition temperature and superconducting volume ratio than any conventional one is provided, which comprises a fullerene doped with rubidium and cesium. This fullerene system superconducting material makes it possible to improve both the superconducting transition temperature and superconducting volume ratio by having rubidium and cesium doped thereinto compared with any conventional fullerene systems. If the chemical composition of this super conducting material is expressed as Rb x Cs y C n , x and y are arbitrary if an equation x+y=3 is satisfied, preferable to be x=2 and y=1, further preferable to be x=1 and y=s. The superconducting transition temperature Tc and superconducting volume ratio when x=1 and y=2 or x=2 and y=1 are superior to those when x=3 and y=0 or x=0 and y=3, respectively.
Inventors
- 👤 Katsumi Tanigaki
- 👤 Thomas Ebbesen
- 👤 Sadanori Kuroshima
- 👤 Junichiro Mizuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:26
CPC Classifications
B; B82; B82Y; B82Y30/00; H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/851; H10N60/853; Y; Y10; Y10S; Y10S423/00; Y10S423/39; Y10S505/00; Y10S505/775; Y10S505/80; Y10S977/00; Y10S977/70; Y10S977/734; Y10S977/735
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
A superconducting material consisting essentially of a fullerene whose chemical composition is C 60 and rubidium (Rb) and cesium (Cs) doped with said fullerene, the superconducting composition having a chemical composition of Rb x Cs y C 60 , where x and y are positive integers and the sum of x+y is approximately 3.
Claim 2
Dependent Claim
54 words
A superconducting material consisting essentially of a fullerene whose chemical composition is C 60 and rubidium (Rb) and cesium (Cs) doped with said fullerene, the superconducting composition having a chemical composition of Rb x Cs y C 60 , where x and y are positive integers and the sum of x+y is approximately 3.
Claim 3
Dependent Claim
10 words
A superconducting material as claimed in claim 1, wherein x<y.
Claim 4
Dependent Claim
12 words
A superconducting material as claimed in claim 1, wherein x=2 and y=1.
Claim 5
Dependent Claim
12 words
A superconducting material as claimed in claim 2, wherein x=1 and y=2.
Claim 6
Dependent Claim
37 words
A superconducting material consisting essentially of a fullerene whose chemical composition is C 60 and rubidium (Rb) and cesium (Cs) doped with said fullerene, atoms of said cesium being present in a lattice space of said fullerene.
Claim 7
Dependent Claim
37 words
A superconducting material consisting essentially of a fullerene whose chemical composition is C 60 and rubidium (Rb) and cesium (Cs) doped with said fullerene, atoms of said cesium being present in a lattice space of said fullerene.
Claim 8
Dependent Claim
47 words
A superconducting material as claimed in claim 5, wherein a chemical composition of said fullerene doped with rubidium and cesium is express as Rb x Cs y C 60 , wherein x and y are positive numbers and the sum of x and y is approximately 3.
Claim 9
Dependent Claim
16 words
A superconducting material as claimed in claim 5, wherein x and y satisfy an equation x<y.
Claim 10
Dependent Claim
12 words
A superconducting material as claimed in claim 6, wherein x=2 and y=1.
Claim 11
Dependent Claim
12 words
A superconducting material as claimed in claim 6, wherein x=1 and y=2.
Claim 12
Dependent Claim
21 words
A superconducting material as claimed in claim 8, wherein a transition temperature of said superconducting material is at least 31 K.
Claim 13
Dependent Claim
20 words
A superconducting material as claimed in claim 8, wherein a superconducting volume ratio of said material is at least 30%.
Claim 14
Dependent Claim
21 words
A superconducting material as claimed in claim 9, wherein a transition temperature of said superconducting material is at least 33 K.
Claim 15
Dependent Claim
20 words
A superconducting material as claimed in claim 9, wherein a superconducting volume ratio of said material is at least 50%.
References Cited (Backward Citations)
US5223479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |