US2982961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual feed antenna
Assignee: Individual
•
Filing: 1957-03-20
•
Granted: 1961-05-02
•
Expires: 1977-03-20
Abstract
No abstract record available.
Inventors
- 👤 Calvin C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:37
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/001; H01Q21/00; H01Q21/28; H01Q5/00; H01Q5/40; H01Q5/45
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB399770A
Cited
US2216707A
Cited
US2398096A
Cited
US2430568A
Cited
US2441574A
Cited
US2691731A
Cited
US2753551A
Cited
US2669658A
Cited
US2820965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |