US2775659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascode circuits
Assignee: Standard Coil Products Co Inc
•
Filing: 1951-02-20
•
Granted: 1956-12-25
•
Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Nelson Edwin Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:54
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/42; H03F3/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2298297A
Cited
US2289091A
Cited
US2524821A
Cited
US2463229A
Cited
US2571045A
Cited
US2489266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |