US2416177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide for high-frequency electric currents
Assignee: Callenders Cable and Construction Co Ltd
•
Filing: 1945-06-02
•
Granted: 1947-02-18
•
Expires: 1965-06-02
Abstract
No abstract record available.
Inventors
- 👤 Hollingsworth Douglas Taft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/12; H01P3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2374498A
Cited
US2400777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |