Patent US1347046A successfully refreshed from Google Patents.
US2839752A
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Antenna with variable inductance for tuning
Assignee: Individual
•
Filing: 1954-07-19
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Granted: 1958-06-17
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Expires: 1974-07-19
Abstract
No abstract record available.
Inventors
- 👤 Webster Marvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:57
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/08; H01Q1/10; H01F; H01F21/00; H01F21/02; H01F21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US739176A
Cited
US1768666A
Cited
GB366150A
Cited
US2070376A
Cited
GB645898A
Cited
US2523896A
Cited
US2719920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |