Patent US3887364A successfully refreshed from Google Patents.
US3887364A
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Superconducting materials
Assignee: Hitachi Ltd
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Filing: 1972-12-01
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Granted: 1975-06-03
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Expires: 1992-12-01
Abstract
Abstract A NbKAl type intermetallic compound superconducting material, in which part of Al is replaced with an element selected from a group consisting of Pb, Bi, Tl, Cu, Sb, Te, Y, Ce, Pr, Eu, Ca and Zn and, if necessary, part of Nb is replaced with Ta, is disclosed. This material has a critical temperature of 18*K or higher and a Beta -W type crystalline structure, with the value of K ranging between 2.8 and 4.0.
Inventors
- 👤 Ushio Kawabe
- 👤 Mitsuhiro Kudo
- 👤 Shigeo Fukase
- 👤 Masato Ishibashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:06
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; C; C22; C22C; C22C27/00; C22C27/02; Y; Y10; Y10S; Y10S420/00; Y10S420/901; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/805; Y10S505/806
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
96 words
A SUPERCONDUCTING MATERIAL HAVING CRITICAL TEMPERATURE, SAID MATERIAL BEING AN ALLOY REPRESENTED BY THE FORMULA: NB-AL-M, WHEREIN M IS AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF 0.05-3.8 ATOMIC PERCENT OF TE, 0.05-2.4 ATOMIC PERCENT OF Y, 3.2-4.2 ATOMIC PERCENT OF Y, 0.05-3.2 ATOMIC PERCENT OF CE, 0.05-2.7 ATOMIC PERCENT OF PR, 0.05-2.7 ATOMIC PERCENT OF EU, 0.05-2.1 ATOMIC PERCENT OF CA AND 0.05-7.2 ATOMIC PERCENT OF ZN, WHEREIN THE AMOUNT OF NB IS IN A RANGE OF 74-80 ATOMIC PERCENT AND THE BALANCE OF SAID ALLOY IS AL AND VERY MINOR AMOUNTS OF UNAVOIDABLE IMPURITIES.
Claim 2
Dependent Claim
96 words
A SUPERCONDUCTING MATERIAL HAVING CRITICAL TEMPERATURE, SAID MATERIAL BEING AN ALLOY REPRESENTED BY THE FORMULA: NB-AL-M, WHEREIN M IS AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF 0.05-3.8 ATOMIC PERCENT OF TE, 0.05-2.4 ATOMIC PERCENT OF Y, 3.2-4.2 ATOMIC PERCENT OF Y, 0.05-3.2 ATOMIC PERCENT OF CE, 0.05-2.7 ATOMIC PERCENT OF PR, 0.05-2.7 ATOMIC PERCENT OF EU, 0.05-2.1 ATOMIC PERCENT OF CA AND 0.05-7.2 ATOMIC PERCENT OF ZN, WHEREIN THE AMOUNT OF NB IS IN A RANGE OF 74-80 ATOMIC PERCENT AND THE BALANCE OF SAID ALLOY IS AL AND VERY MINOR AMOUNTS OF UNAVOIDABLE IMPURITIES.
Claim 3
Dependent Claim
97 words
A superconducting material having high critical temperature, said material being an alloy represented by the formula: Nb-Al-M, wherein M is an element selected from the group consisting of 0.05-3.8 atomic percent of Te, 0.05-2.4 atomic percent of Y, 3.2-4.2 atomic percent of Y, 0.05-3.2 atomic percent of Ce, 0.05-2.7 atomic percent of Pr, 0.05-2.7 atomic percent of Eu, 0.05-2.1 atomic percent of Ca and 0.05-7.2 atomic percent of Zn, wherein the amount of Nb is in a range of 74-80 atomic percent and the balance of said alloy is Al and very minor amounts of unavoidable impurities.
Claim 4
Dependent Claim
97 words
A superconducting material having high critical temperature, said material being an alloy represented by the formula: Nb-Al-M, wherein M is an element selected from the group consisting of 0.05-3.8 atomic percent of Te, 0.05-2.4 atomic percent of Y, 3.2-4.2 atomic percent of Y, 0.05-3.2 atomic percent of Ce, 0.05-2.7 atomic percent of Pr, 0.05-2.7 atomic percent of Eu, 0.05-2.1 atomic percent of Ca and 0.05-7.2 atomic percent of Zn, wherein the amount of Nb is in a range of 74-80 atomic percent and the balance of said alloy is Al and very minor amounts of unavoidable impurities.
Claim 5
Dependent Claim
22 words
The superconducting material of claim 1, in which less than 4 percent of Nb is replaced with an equal amount of Ta.
Claim 6
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-3.8 atomic percent of Te.
Claim 7
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-2.4 atomic percent of Y.
Claim 8
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 3.2-4.2 atomic percent of Y.
Claim 9
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-3.2 atomic percent of Ce.
Claim 10
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-2.7 atomic percent of Pr.
Claim 11
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-2.7 atomic percent of Eu.
Claim 12
Dependent Claim
16 words
The superconducting material of claim 1, in which M is 0.05-2.1 atomic percent sign of Ca.
Claim 13
Dependent Claim
15 words
The superconducting material of claim 1, in which M is 0.05-7.2 atomic percent of Zn.
Claim 14
Dependent Claim
94 words
A superconducting material having high critical temperature greater than 18.5*K, said material being an alloy represented by the formula Nb-Al-M, where M is an eleMent selected from the group consisting of 0.2-3.2 at percent of Te, 0.6-1.9 at percent of Y, 0.2-2.8 at percent of Ce, 0.3-2.3 at percent of Pr, 0.3-2.3 at percent of Eu, 0.3-1.9 at percent of Ca and 0.2-5.8 at percent of Zn, wherein the amount of Nb is in a range of 74-80 percent and the balance of said alloy is Al and very minor amounts of unavoidable impurities.
Claim 15
Dependent Claim
94 words
A superconducting material having high critical temperature greater than 18.5*K, said material being an alloy represented by the formula Nb-Al-M, where M is an eleMent selected from the group consisting of 0.2-3.2 at percent of Te, 0.6-1.9 at percent of Y, 0.2-2.8 at percent of Ce, 0.3-2.3 at percent of Pr, 0.3-2.3 at percent of Eu, 0.3-1.9 at percent of Ca and 0.2-5.8 at percent of Zn, wherein the amount of Nb is in a range of 74-80 percent and the balance of said alloy is Al and very minor amounts of unavoidable impurities.
Claim 16
Dependent Claim
22 words
The superconducting material of claim 11, in which less than 4 percent of Nb is replaced with an equal amount of Ta.
Claim 17
Dependent Claim
55 words
The superconducting material of claim 11, in which said M is an element selected from the group consisting of 0.9-1.6 at percent of Te, 0.9-1.6 at percent of Y, 0.9-1.6 at percent of Ce, 0.9-1.6 at percent of Pr, 0.9-1.6 at percent of Eu, 0.9-1.6 at percent of Ca and 0.9-1.6 at percent of Zn.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |