US2512849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic wave guide
Assignee: EMI Ltd
•
Filing: 1945-04-30
•
Granted: 1950-06-27
•
Expires: 1965-04-30
Abstract
No abstract record available.
Inventors
- 👤 Cork Edward Cecil
- 👤 Bowman-Manifold Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:38
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129712A
Cited
US2165961A
Cited
US2281274A
Cited
US2250934A
Cited
US2356414A
Cited
US2374498A
Cited
US2396044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-26 | 1953-12-26 | 1954-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-26 | 1957-12-26 | 1958-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-26 | 1961-12-26 | 1962-06-27 | $7700.00 | Window Closed / Lapsed |