US2597391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna
Assignee: United States, WAR, Secretary of
•
Filing: 1946-04-30
•
Granted: 1952-05-20
•
Expires: 1966-04-30
Abstract
No abstract record available.
Inventors
- 👤 Sichak William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:24
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1898197A
Cited
DE636809C
Cited
US2118419A
Cited
US2206923A
Cited
GB495977A
Cited
US2283925A
Cited
US2407068A
Cited
US2421593A
Cited
US2436408A
Cited
US2434253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |