US2477510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slotted wave guide antenna
Assignee: Individual
•
Filing: 1944-01-31
•
Granted: 1949-07-26
•
Expires: 1964-01-31
Abstract
No abstract record available.
Inventors
- 👤 Chu Lan Jen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:13
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/123; H01Q; H01Q21/00; H01Q21/0006; H01Q21/0037; H01Q21/0043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |