US3237130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-port directional coupler with direct current isolated intermediate conductor disposed about inner conductors
Assignee: Emerson Electric Co
•
Filing: 1963-04-17
•
Granted: 1966-02-22
•
Expires: 1983-04-17
Abstract
No abstract record available.
Inventors
- 👤 Seymour B Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A FOUR-PORT MICROWAVE DIRECTIONAL COUPLER COMPRISING: A PAIR OF SPACED, PARALLEL INNER CONDUCTORS HAVING A LENGTH APPROXIMATELY 1/4 WAVELENGTH LONG AT MIDBAND; AN OUTER, HOLLOW CONDUCTOR DISPOSED ABOUT SAID INNER CONDUCTORS; AND AN INTERMEDIATE CONDUCTOR MEANS DISPOSED ABOUT SAID INNER CONDUCTORS WITHIN SAID OUTER CONDUCTORS AND BETWEEN SAID INNER CONDUCTORS, SAID INTERMEDIATE CONDUCTORS MEANS BEING DIRECT CURRENT ISOLATED FROM THE OTHER SAID CONDUCTORS.
Claim 2
Dependent Claim
63 words
A FOUR-PORT MICROWAVE DIRECTIONAL COUPLER COMPRISING: A PAIR OF SPACED, PARALLEL INNER CONDUCTORS HAVING A LENGTH APPROXIMATELY 1/4 WAVELENGTH LONG AT MIDBAND; AN OUTER, HOLLOW CONDUCTOR DISPOSED ABOUT SAID INNER CONDUCTORS; AND AN INTERMEDIATE CONDUCTOR MEANS DISPOSED ABOUT SAID INNER CONDUCTORS WITHIN SAID OUTER CONDUCTORS AND BETWEEN SAID INNER CONDUCTORS, SAID INTERMEDIATE CONDUCTORS MEANS BEING DIRECT CURRENT ISOLATED FROM THE OTHER SAID CONDUCTORS.
References Cited (Backward Citations)
US3025480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |