US3550145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manipole broadband antenna
Assignee: United States Department of the Army
•
Filing: 1968-08-05
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Granted: 1970-12-22
•
Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Chen To Tai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:45
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/40; H01Q5/00; H01Q5/30; H01Q5/307; H01Q5/342; H01Q5/357; H01Q5/364; H01Q5/371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1388441A
Cited
GB414296A
Cited
US2267889A
Cited
US2239724A
Cited
US2250531A
Cited
US2206821A
Cited
FR52479E
Cited
US2996718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |