US3377570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four port ferrite circulator having slot symmetrically located between adjacent conducting arms
Assignee: AT&T Inc
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Filing: 1966-04-18
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Granted: 1968-04-09
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Expires: 1986-04-18
Abstract
No abstract record available.
Inventors
- 👤 William A Dean
- 👤 Clifford E Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:44
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SINGLE-JUNCTION, FOUR-PORT CIRCULATOR COMPRISING: FOUR LENGTHS OF STRIP TRANSMISSION LINE EACH OF WHICH HAS AN INNER CONDUCTOR WHICH IS SPACED BETWEEN AND PARALLEL TO A COMMON PAIR OF OUTER CONDUCTORS; SAID INNER CONDUCTORS LYING IN A COMMON PLANE AND TERMINATING 90 DEGREES APART ABOUT THE PERIPHERY OF A CONDUCTIVE CIRCULAR DISC; SAID DISC HAVING NO MORE THAN FOUR RADIAL SLOTS OF UNIFORM WIDTH EXTENDING FROM ITS OUTER BOUNDARY INWARD TOWARDS ITS CENTER; EACH SLOT BEING SYMMETRICALLY LOCATED BETWEEN PAIRS OF ADJACENT CONDUCTORS;
Claim 2
Dependent Claim
83 words
A SINGLE-JUNCTION, FOUR-PORT CIRCULATOR COMPRISING: FOUR LENGTHS OF STRIP TRANSMISSION LINE EACH OF WHICH HAS AN INNER CONDUCTOR WHICH IS SPACED BETWEEN AND PARALLEL TO A COMMON PAIR OF OUTER CONDUCTORS; SAID INNER CONDUCTORS LYING IN A COMMON PLANE AND TERMINATING 90 DEGREES APART ABOUT THE PERIPHERY OF A CONDUCTIVE CIRCULAR DISC; SAID DISC HAVING NO MORE THAN FOUR RADIAL SLOTS OF UNIFORM WIDTH EXTENDING FROM ITS OUTER BOUNDARY INWARD TOWARDS ITS CENTER; EACH SLOT BEING SYMMETRICALLY LOCATED BETWEEN PAIRS OF ADJACENT CONDUCTORS;
References Cited (Backward Citations)
US3174116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |