Patent US3483561A successfully refreshed from Google Patents.
US3483561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction finding antenna
Assignee: United States Department of the Air Force
•
Filing: 1968-07-23
•
Granted: 1969-12-09
•
Expires: 1988-07-23
Abstract
No abstract record available.
Inventors
- 👤 Leo W Procopio Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; G; G01; G01S; G01S3/00; G01S3/02; G01S3/14; G01S3/58
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3054105A
Cited
US3076193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |