Patent US2828444A successfully refreshed from Google Patents.
US2828444A
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US
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Cavity magnetron
Assignee: International Standard Electric Corp
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Filing: 1948-04-10
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Granted: 1958-03-25
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Expires: 1968-04-10
Abstract
No abstract record available.
Inventors
- 👤 Milner W Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:21
CPC Classifications
H; H01; H01J; H01J25/00; H01J25/50; H01J25/52; H01J25/58; H01J25/587
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2201216A
Cited
GB509102A
Cited
GB522360A
Cited
US2458802A
Cited
US2475960A
Cited
US2452272A
Cited
US2553425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |