US2951218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional couplings
Assignee: TDK Micronas GmbH
•
Filing: 1957-02-19
•
Granted: 1960-08-30
•
Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Arditi Maurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:57
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/081; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/184; H01P5/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735069A
Cited
US1940769A
Cited
US2175710A
Cited
US2751556A
Cited
US2794958A
Cited
US2774046A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |