US3560893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface strip transmission line and microwave devices using same
Assignee: RCA Corp
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Filing: 1968-12-27
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Granted: 1971-02-02
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Expires: 1988-12-27
Abstract
Abstract A DESIRABLE TRANSMISSION LINE CONFIGURATION IS DESCRIBED WHEREIN A NARROW STRIP-LIKE CONDUCTOR AND A WIDER GROUND CONDUCTOR ARE ARRANGED IN AN ADJACENT, PARALLEL AND COPLANAR RELATIONSHIP ON ONE SURFACE OF A DIELECTRIC SUBSTRATE. ALSO DESCRIBED HEREIN ARE MANY NEW TYPES OF MICROWAVE DEVICES SUCH AS ISOLATORS, PHASE SHIFTERS, COUPLERS, ETC. WHICH USE THIS TYPE OF TRANSMISSION LINE CONFIGURATION.
Inventors
- 👤 Cheng Paul Wen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:25
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |