US2512468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide with mode suppression means
Assignee: EMI Ltd
•
Filing: 1946-08-02
•
Granted: 1950-06-20
•
Expires: 1966-08-02
Abstract
No abstract record available.
Inventors
- 👤 Percival William Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:18
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/16; H01P1/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |