US3752665A
Expired / Lapsed
US
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Synthesis of superconducting compounds by explosive compaction of powders
Assignee: National Aeronautics and Space Administration
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Filing: 1971-07-08
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Granted: 1973-08-14
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Expires: 1991-07-08
Abstract
Abstract SUPERCONDUCTING INTERMETALLIC COMPOUNDS, SUCH AS NB3SN ARE PREPARED BY DISPOSING A FINELY DIVIDED, STOICHIOMETRIC MIXTURE OF ELEMENTAL METAL POWDERS IN A CONTAINER, SURROUNDING THE CONTAINER WITH AN EXPLOSIVE AND DETONATING THE EXPLOSIVE. THE RESULTING EXPLOSIVE SHOCK WAVE PROVIDES THE NECESSARY REACTION CONDITIONS FOR COMPOUND FORMATION.
Inventors
- 👤 Roy Upendra
- 👤 G Otto
- 👤 O Reece
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:34
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/047; B; B22; B22F; B22F3/00; B22F3/02; B22F3/08; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0184; Y; Y10; Y10S; Y10S420/00; Y10S420/901; Y10S505/00; Y10S505/80; Y10S505/801; Y10S505/805; Y10S505/806; Y10S505/815; Y10S505/822; Y10S505/823; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |