US2770783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface wave transmission line
Assignee: International Standard Electric Corp
•
Filing: 1950-05-23
•
Granted: 1956-11-13
•
Expires: 1970-05-23
Abstract
No abstract record available.
Inventors
- 👤 Andre G Clavier
- 👤 David L Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:48
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/10; H01P5/00; H01P5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2207845A
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US2269991A
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US2438795A
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US2453759A
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US2492404A
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US2588610A
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US2491601A
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US2471732A
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US2685068A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |