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US3413574A
Expired / Lapsed
US
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Broadband high efficiency impedance step-up 180 phase shift hybrid circuits
Assignee: Collins Radio Co
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Filing: 1966-10-03
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Granted: 1968-11-26
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Expires: 1986-10-03
Abstract
No abstract record available.
Inventors
- 👤 Klaus G Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:20
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/58; H04B1/581; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/22; H01Q3/00; H01Q3/26; H03; H03H; H03H7/00; H03H7/48; H03H7/482; H03H7/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1809839A
Cited
US3273079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |