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US2790089A
Expired / Lapsed
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Three-element semi-conductor device
Assignee: NAT AIRCRAFT CORP
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Filing: 1953-03-23
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Granted: 1957-04-23
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Lowell S Pelfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/32; H10D48/34; H10D48/345; H10D99/00; H10F; H10F99/00; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W72/00; H10W76/00; H10W76/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2592683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |