Patent US3409554A successfully refreshed from Google Patents.
US3409554A
Expired / Lapsed
US
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Gd or sm doped silicon semiconductor composition
Assignee: National Aeronautics and Space Administration
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Filing: 1966-12-20
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Granted: 1968-11-05
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Expires: 1986-12-20
Abstract
No abstract record available.
Inventors
- 👤 Mandelkorn Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:46
CPC Classifications
H; H10; H10P; H10P32/00; C; C30; C30B; C30B13/00; C30B13/06; H10F; H10F99/00; H10P95/00
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |