Patent WO1998001086A1 successfully refreshed from Google Patents.
US2671883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide impedance transformer
Assignee: Individual
•
Filing: 1952-03-19
•
Granted: 1954-03-09
•
Expires: 1972-03-19
Abstract
No abstract record available.
Inventors
- 👤 Robert H Dicke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:03
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19; H01P5/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2410840A
Cited
US2445895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |