US2663797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directive antenna
Assignee: AT&T Inc
•
Filing: 1949-05-05
•
Granted: 1953-12-22
•
Expires: 1969-05-05
Abstract
No abstract record available.
Inventors
- 👤 Winston E Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:58
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/20; H01Q13/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US706739A
Cited
US2178299A
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US2283935A
Cited
US2323641A
Cited
US2351723A
Cited
US2485920A
Cited
US2455888A
Cited
US2492358A
Cited
US2577510A
Cited
US2588610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |