US2489288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiating electromagnetic wave guide and resonator
Assignee: Leland Stanford Junior University
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Filing: 1940-07-10
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Granted: 1949-11-29
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Expires: 1960-07-10
Abstract
No abstract record available.
Inventors
- 👤 William W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:38
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/01; H01Q13/00; H01Q13/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2206923A
Cited
US2241119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |