Patent US2853681A successfully refreshed from Google Patents.
US2853681A
Expired / Lapsed
US
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Dual frequency rotatable joint
Assignee: General Electric Co
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Filing: 1953-01-30
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Granted: 1958-09-23
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Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Allen E Smoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:01
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/06; H01P1/062; H01P1/066; H01P1/069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934602A
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US2128400A
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US2580389A
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US2421033A
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US2434509A
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US2465922A
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US2426633A
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US2484798A
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US2713151A
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US2523348A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |