US4151329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nb3 Ge Superconductive films
Assignee: General Electric Co
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Filing: 1978-03-06
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Granted: 1979-04-24
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Expires: 1998-03-06
Abstract
Abstract A superconductive film of Nb 3 Ge is produced by providing within a vacuum chamber a heated substrate and sources of niobium and germanium, reducing the pressure within the chamber to a residual pressure no greater than about 10 -5 mm Hg, introducing oxygen into the resulting evacuated chamber in controlled amounts and vaporizing the niobium and germanium to deposit a film of Nb 3 Ge on the heated substrate.
Inventors
- 👤 Raymond A. Sigsbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:26
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0005; C23C14/06; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S420/00; Y10S420/901; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/805; Y10S505/806; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/818; Y10S505/819; Y10S505/825; Y10S505/912; Y10S505/913; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12438; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12861
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A superconductive continuous film of Nb 3 Ge having a surface area of at least one square centimeter ranging in composition up to about 2 atomic % from stoichiometric composition having a critical temperature T c of at least about 20 degrees Kelvin, said critical temperature T c being the temperature at which said film becomes 50% superconducting in that it has one half of its normal conductor resistance existing at three degrees Kelvin above T c , said film having a transition width of less than one degree Kelvin extending from the temperature in degrees Kelvin at which said film becomes 10% superconducting in that it has 90% of its normal conductor resistance existing at three degrees Kelvin above T c to the temperature in degrees Kelvin at which said film becomes 90% superconducting in that it has 10% of its normal conductor resistance existing at three degrees Kelvin above T c .
Claim 2
Dependent Claim
154 words
A superconductive continuous film of Nb 3 Ge having a surface area of at least one square centimeter ranging in composition up to about 2 atomic % from stoichiometric composition having a critical temperature T c of at least about 20 degrees Kelvin, said critical temperature T c being the temperature at which said film becomes 50% superconducting in that it has one half of its normal conductor resistance existing at three degrees Kelvin above T c , said film having a transition width of less than one degree Kelvin extending from the temperature in degrees Kelvin at which said film becomes 10% superconducting in that it has 90% of its normal conductor resistance existing at three degrees Kelvin above T c to the temperature in degrees Kelvin at which said film becomes 90% superconducting in that it has 10% of its normal conductor resistance existing at three degrees Kelvin above T c .
Claim 3
Dependent Claim
28 words
A superconductive film according to claim 1 wherein said film ranges in width up to about 10 centimeters and wherein there is no maximum limit on its length.
Claim 4
Dependent Claim
10 words
A superconductive film according to claim 1 which is self-supporting.
Claim 5
Dependent Claim
14 words
A superconductive film according to claim 1 which is adherently supported by a substrate.
Claim 6
Dependent Claim
17 words
A superconductive film according to claim 1 wherein the substrate is in the form of a tape.
References Cited (Backward Citations)
US4043888A
Cited
US3958327A
Cited
DE2441142A1
Cited
DE2542379A1
Cited
US4050147A
Cited
US4005990A
Cited
US4054686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |