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Patent US2166237A successfully refreshed from Google Patents.
US2166237A
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Antenna coupling system
Assignee: AT&T Inc
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Filing: 1938-06-15
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Granted: 1939-07-18
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Expires: 1958-06-15
Abstract
No abstract record available.
Inventors
- 👤 Robert A Cushman
- 👤 Phillip H Smith
- 👤 Malcolm A Specht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:43
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; Y; Y10; Y10T; Y10T292/00; Y10T292/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-07-17 | 1943-01-16 | 1943-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-17 | 1947-01-16 | 1947-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-17 | 1951-01-16 | 1951-07-18 | $7700.00 | Window Closed / Lapsed |