US2749520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional coupling means for transmission lines
Assignee: Individual
•
Filing: 1952-11-04
•
Granted: 1956-06-05
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Expires: 1972-11-04
Abstract
No abstract record available.
Inventors
- 👤 Burt J Bittner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:03
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2580678A
Cited
US2459197A
Cited
US2580679A
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US2532317A
Cited
US2575799A
Cited
US2641648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |