Patent US3355680A successfully refreshed from Google Patents.
US3355680A
Expired / Lapsed
US
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Microwave ferrite devices having particular arrangements for the magnetizing source
Assignee: E & M Lab
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Filing: 1965-03-29
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Granted: 1967-11-28
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Saltzman Harold
- 👤 Thomas F Vallar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A SWITCHABLE MICROWAVE CIRCULATOR COMPRISING A SYMMETRICAL MULTI-PORT JUNCTION HAVING A CENTRAL AXIS, FERRITE MEANS DISPOSED WITHIN THE JUNCTION AT THE CENTRAL AXIS, PERMANENT MAGNET MEANS POSITIONED ADJACENT A FIRST END OF THE FERRITE MEANS AND AT THE CENTRAL AXIS, ELECTROMAGNET MEANS POSITIONED ADJACENT THE PERMANENT MAGNET MEANS AT THE CENTRAL AXIS, AND MEANS PROVIDING A MAGNETIC RETURN PATH FROM THE ELECTROMAGNET MEANS TO THE END OF THE FERRITE MEANS OPPOSITE SAID FIRST END.
Claim 2
Dependent Claim
115 words
A MICROWAVE FERRITE DEVICE FOR STRIP TRANSMISSION LINES COMPRISING THE COMBINATION OF A STRIP TRANSMISSION LINE UNIT INCLUDING A CENTER CONDUCTOR AND A PAIR OF GROUND PLANES, AT LEAST ONE OF WHICH IS OF MAGNETIC MATERIAL, FERRITE MEANS DISPOSED BETWEEN THE GROUND PLANES ALONG AN AXIS NORMAL TO THE GROUND PLANES, A SINGLE DISK-SHAPED PERMANENT MAGNET POSITIONED ALONG THE AXIS OF THE FERRITE MEANS AND ADJACENT THE FERRITE MEANS, AND MAGNETIC MEANS MEGNETICALLY COUPLED TO SAID MAGNETIC GROUND PLANE AND COMPLETING A MAGNETIC CIRCUIT PATH ABOUT THE STRIP TRANSMISSION LINE UNIT TO SPACED APART REGIONS ALONG THE AXIS OF THE SAID FERRITE MEANS, WHEREBY SAID FERRITE MEANS IS MAGNETIZED IN A DIRECTION ALONG THE AXIS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |