Patent US3149385A successfully refreshed from Google Patents.
Patent US4127891A successfully refreshed from Google Patents.
US3473162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio observation apparatus utilizing a return beam
Assignee: Siemens AG
•
Filing: 1967-11-06
•
Granted: 1969-10-14
•
Expires: 1987-11-06
Abstract
No abstract record available.
Inventors
- 👤 Werner Veith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:16
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/20; H01Q3/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3191170A
Cited
US3345631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |