US2570197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual purpose antenna
Assignee: Individual
•
Filing: 1949-06-16
•
Granted: 1951-10-09
•
Expires: 1969-06-16
Abstract
No abstract record available.
Inventors
- 👤 John I Bohnert
- 👤 Allen S Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/18; H01Q25/00; H01Q25/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1828705A
Cited
US2430568A
Cited
GB601660A
Cited
US2423648A
Cited
US2446436A
Cited
US2412867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |