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US2763003A
Expired / Lapsed
US
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Helical antenna construction
Assignee: Individual
•
Filing: 1953-07-01
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Granted: 1956-09-11
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Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Edward F Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
H; H01; H01Q; H01Q11/00; H01Q11/02; H01Q11/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2296781A
Cited
US2575377A
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US2590493A
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US2552599A
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US2614058A
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US2637533A
Cited
US2630530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |