US2790899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system which supplements that of portable radio inside automobile
Assignee: Stromberg Carlson Corp
•
Filing: 1955-06-08
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Granted: 1957-04-30
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Expires: 1975-06-08
Abstract
No abstract record available.
Inventors
- 👤 Harold O Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1985241A
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US2138894A
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US2203442A
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US2262956A
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US2407417A
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US2494451A
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US2582277A
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US2483815A
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US2567431A
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US2569687A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |