Patent US4527077A successfully refreshed from Google Patents.
Patent US2644090A successfully refreshed from Google Patents.
US2644090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recessed slot antenna
Assignee: Individual
•
Filing: 1948-03-05
•
Granted: 1953-06-30
•
Expires: 1968-03-05
Abstract
No abstract record available.
Inventors
- 👤 Dorne Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:57
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2206923A
Cited
GB493695A
Cited
GB507473A
Cited
FR841036A
Cited
US2415094A
Cited
US2283935A
Cited
US2400867A
Cited
US2414266A
Cited
US2368663A
Cited
GB580569A
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |