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Patent US3492547A successfully refreshed from Google Patents.
US3492547A
Expired / Lapsed
US
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Radiation hardened semiconductor device
Assignee: Northrop Grumman Corp
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Filing: 1967-09-18
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Granted: 1970-01-27
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Expires: 1987-09-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Recko
- 👤 George C Messenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:59
CPC Classifications
H; H10; H10W; H10W20/00; H10W20/40; H10P; H10P95/00; H10W74/00; H10W74/40; H10W74/43; H10W72/00; H10W72/50; H10W72/541; H10W72/5449; H10W72/851; H10W72/874; H10W72/884
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3271634A
Cited
US3271638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |