US2817823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular waveguide output for magnetrons
Assignee: Individual
•
Filing: 1953-12-11
•
Granted: 1957-12-24
•
Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Okress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:03
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2400777A
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US2451876A
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US2473724A
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US2489131A
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GB597216A
Cited
US2480189A
Cited
US2768327A
Cited
US2678404A
Cited
US2773246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |