US2540757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna
Assignee: Individual
•
Filing: 1944-06-16
•
Granted: 1951-02-06
•
Expires: 1964-06-16
Abstract
No abstract record available.
Inventors
- 👤 Henry J Riblet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:12
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; H01Q19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB302793A
Cited
US2206683A
Cited
US2253501A
Cited
US2283935A
Cited
US2287533A
Cited
US2270965A
Cited
US2281196A
Cited
US2270314A
Cited
FR883665A
Cited
US2433368A
Cited
US2469419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |