US2760055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna of ionized air
Assignee: AT&T Inc
•
Filing: 1952-08-20
•
Granted: 1956-08-21
•
Expires: 1972-08-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence C Laster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:26
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309031A
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US1533730A
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US1687792A
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US1948552A
Cited
US2263377A
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US2272607A
Cited
GB601207A
Cited
US2411400A
Cited
US2546984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |