Patent US3518673A successfully refreshed from Google Patents.
US3518673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system for ils localizers
Assignee: SINTEF AS
•
Filing: 1968-06-04
•
Granted: 1970-06-30
•
Expires: 1988-06-04
Abstract
No abstract record available.
Inventors
- 👤 Ole Petter Hakonsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:58
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/22; G; G01; G01S; G01S1/00; G01S1/02; H01Q11/00; H01Q11/02; H01Q11/10; H01Q19/00; H01Q19/28; H01Q19/30; H01Q21/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2513493A
Cited
US2593485A
Cited
US2993665A
Cited
US3147479A
Cited
US3257661A
Cited
US3283325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |