Patent US2511611A successfully refreshed from Google Patents.
US2511611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aperiodic directive antenna system
Assignee: Hazeltine Research Inc
•
Filing: 1946-09-17
•
Granted: 1950-06-13
•
Expires: 1966-09-17
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:55
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1615896A
Cited
US1898661A
Cited
US2126295A
Cited
US2153589A
Cited
US2247743A
Cited
US2298449A
Cited
US2366195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |