Patent US2939121A successfully refreshed from Google Patents.
US2939121A
Expired / Lapsed
US
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Selective load energization
Assignee: Fairchild Semiconductor Corp
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Filing: 1953-09-04
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Granted: 1960-05-31
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Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Saykay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:16
CPC Classifications
H; H04; H04L; H04L17/00; H04L17/02; H04L17/04; H04M; H04M15/00; H04M15/04
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) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |