US2519209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna
Assignee: Hazeltine Research Inc
•
Filing: 1945-03-30
•
Granted: 1950-08-15
•
Expires: 1965-03-30
Abstract
No abstract record available.
Inventors
- 👤 Harold A Wheeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
H; H01; H01Q; H01Q7/00; H01Q1/00; H01Q1/36; H01Q21/00; H01Q21/29; H01Q21/293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1744548A
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US1807386A
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US2099296A
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US2064112A
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US2059186A
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US2194554A
Cited
US2283938A
Cited
FR877658A
Cited
US2359620A
Cited
US2383490A
Cited
US2430664A
Cited
US2430353A
Cited
US2433183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |