Patent DE571345C successfully refreshed from Google Patents.
US3748728A
Expired / Lapsed
US
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Method of making granular superconductors
Assignee: Corning Glass Works
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Filing: 1971-10-22
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Granted: 1973-07-31
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Expires: 1991-10-22
Abstract
Abstract Disclosed is a method of forming a composite superconductive body comprising a porous glass matrix having a granular system of superconductive material disposed within the pores thereof. Adjacent grains of supercondcutive material are spatially separated but are electrically connected by electron tunneling. The critical field of these granular superconductors can be modified by processing either the porous glass matrix or the molten superconductor prior to impregnation of the superconductive material into the matrix.
Inventors
- 👤 J Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:45
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/20; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/912; Y10S505/913; Y10S505/915; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
The method of claim 1 wherein said matrix is porous glass and the step of conditioning said superconductive material comprises removing OH-groups from the surfaces of the pores of said porous glass prior to the step of immersing.
Claim 2
Dependent Claim
16 words
The method of claim 2 wherein said OH-groups are removed by chlorinating said porous glass matrix.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the step of conditioning said superconductive material comprises bubbling through said molten material a gas selected from the group consisting of oxygen and hydrogen prior to the step of immersing.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the step of conditioning said superconductive material comprises mixing a powdered oxide of said superconductive material with said molten material.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |