USRE27755E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cheng paul wen
Assignee: —
•
Filing: 1971-10-14
•
Granted: 1973-09-11
•
Expires: 1991-10-14
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
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:14
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/003; H01P3/02; H01P3/08; H01P3/081; H01P3/084
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |