US4652697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum-stabilized superconducting wire
Assignee: Hitachi Ltd
•
Filing: 1984-08-15
•
Granted: 1987-03-24
•
Expires: 2004-08-15
Abstract
Abstract An aluminum-stabilized superconducting wire comprises an aluminum member, a copper member, and a first diffusion barrier layer formed between the aluminum member and the copper member. The copper member contains a plurality of bundles each having a multiplicity of fine filaments of Nb 3 Sn embedded in a copper alloy and a second diffusion barrier layer surrounding the copper alloy. Preferably, the ratio m in the cross-sectional areas between the first diffusion barrier layer and the aluminum member is selected to meet the condition of 0.03≦m<3. The aluminum member is disposed at the central portion of the superconducting wire.
Inventors
- 👤 Toshinari Ando
- 👤 Yoshikazu Takahashi
- 👤 Masataka Nishi
- 👤 Susumu Shimamoto
- 👤 Katsuzo Aihara
- 👤 Naofumi Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/887; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
An aluminum-stabilized superconducting wire comprising: an aluminum member disposed at the center portion of said wire; a copper member disposed at an outer portion of said wire; and a first diffusion barrier layer formed between said aluminum member and said copper member; said copper member containing a plurality of bundles each having a multiplicity of fine filaments of Nb 3 Sn embedded in a copper alloy and a second diffusion barrier layer surrounding said copper alloy.
Claim 2
Dependent Claim
76 words
An aluminum-stabilized superconducting wire comprising: an aluminum member disposed at the center portion of said wire; a copper member disposed at an outer portion of said wire; and a first diffusion barrier layer formed between said aluminum member and said copper member; said copper member containing a plurality of bundles each having a multiplicity of fine filaments of Nb 3 Sn embedded in a copper alloy and a second diffusion barrier layer surrounding said copper alloy.
Claim 3
Dependent Claim
38 words
An aluminum-stabilized superconducting wire according to claim 1, wherein the ratio m of the cross-sectional area of said first diffusion barrier layer to the cross-sectional area of said aluminum member is selected to meet the condition of 0.03≦m<3.
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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |