US2406839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impedance matching device
Assignee: STC PLC
•
Filing: 1942-01-12
•
Granted: 1946-09-03
•
Expires: 1962-01-12
Abstract
No abstract record available.
Inventors
- 👤 Labin Emile
- 👤 James H Nye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/16; H03C1/18; H03C1/20; H03H; H03H11/00; H03H11/02; H03H11/28; H03H2/00; H03H2/005; H03H2/006; H03K; H03K3/00; H03K3/78; H03K3/80; H03K7/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-09-02 | 1950-03-04 | 1950-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-02 | 1954-03-04 | 1954-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-02 | 1958-03-04 | 1958-09-03 | $7700.00 | Window Closed / Lapsed |