US2927221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor devices and trigger circuits therefor
Assignee: Clevite Corp
•
Filing: 1954-01-19
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Granted: 1960-03-01
•
Expires: 1974-01-19
Abstract
No abstract record available.
Inventors
- 👤 Harold L Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:27
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/35; H10; H10D; H10D99/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2600500A
Cited
US2666814A
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US2553491A
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US2790037A
Cited
US2717342A
Cited
US2778885A
Cited
US2778956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |