US2485457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system
Assignee: AT&T Inc
•
Filing: 1944-10-20
•
Granted: 1949-10-18
•
Expires: 1964-10-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph K Potter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/30; H01Q9/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2097491A
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US2036456A
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US2094168A
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US2102410A
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US2208413A
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US2184729A
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US2158875A
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US2207263A
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FR857245A
Cited
US2297513A
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US2274389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |