Patent US2662980A successfully refreshed from Google Patents.
US2662980A
Expired / Lapsed
US
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Rotatron-electrical transducer
Assignee: Individual
•
Filing: 1950-07-25
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Granted: 1953-12-15
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Expires: 1970-07-25
Abstract
No abstract record available.
Inventors
- 👤 Otto G Schwede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:21
CPC Classifications
H; H01; H01J; H01J25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1645304A
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US2182736A
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US2201666A
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US2114035A
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US2242888A
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US2414121A
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US2482452A
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US2432748A
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US2565410A
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US2567904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |