US2966679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unloaded helical antenna
Assignee: Individual
•
Filing: 1957-11-13
•
Granted: 1960-12-27
•
Expires: 1977-11-13
Abstract
No abstract record available.
Inventors
- 👤 Edward F Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:19
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/362
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR810325A
Cited
US2682608A
Cited
US2712602A
Cited
US2681412A
Cited
US2875443A
Cited
US2850732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |