Patent US3338744A successfully refreshed from Google Patents.
US3338744A
Expired / Lapsed
US
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Process for vacuum depositing high purity superconductive niobium films without the use of high vacuum
Assignee: National Research Corp
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Filing: 1963-05-23
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Granted: 1967-08-29
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Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 Philip J Clough
- 👤 Fowler Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:41
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/22; C23C14/24; C23C14/28; C23C14/30; Y; Y10; Y10S; Y10S505/00; Y10S505/80; Y10S505/815; Y10S505/818; Y10S505/819
Claims Analysis
Total Claims: 0
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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) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |