Patent US3447913A successfully refreshed from Google Patents.
US3447913A
Expired / Lapsed
US
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Superconducting composite material
Assignee: GEORGE B YNTEMA
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Filing: 1966-03-18
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Granted: 1969-06-03
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Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 George B Yntema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:01
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/20; Y; Y10; Y10S; Y10S420/00; Y10S420/901; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/928; Y10S428/93; Y10S428/931; Y10S505/00; Y10S505/80; Y10S505/812; Y10S505/813; Y10S505/815; Y10S505/823; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12528; Y10T428/29; Y10T428/2913; Y10T428/298
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |