Patent US3027453A successfully refreshed from Google Patents.
US3027453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical duplexer employing a traveling wave tube as a directional coupler
Assignee: Individual
•
Filing: 1960-12-06
•
Granted: 1962-03-27
•
Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 John L Carter
- 👤 Reingold Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:06
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H; H01; H01J; H01J25/00; H01J25/34; H01J25/36; H01J25/38; H03; H03H; H03H11/00; H03H11/02; H03H11/36; H03H7/00; H03H7/48
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) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |