US2637814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial system
Assignee: Individual
•
Filing: 1949-09-01
•
Granted: 1953-05-05
•
Expires: 1969-09-01
Abstract
No abstract record available.
Inventors
- 👤 Johnson William Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:54
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/18; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231602A
Cited
US2400867A
Cited
US2414266A
Cited
US2368663A
Cited
US2488419A
Cited
US2433924A
Cited
US2508085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |