US2745012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor blocking oscillators
Assignee: AT&T Inc
•
Filing: 1951-08-18
•
Granted: 1956-05-08
•
Expires: 1971-08-18
Abstract
No abstract record available.
Inventors
- 👤 Jean H Felker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:52
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/50; H03K4/54; H03K3/00; H03K3/02; H03K3/26; H03K3/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1913449A
Cited
US2211852A
Cited
US2486776A
Cited
US2586597A
Cited
US2556286A
Cited
US2647957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |