Patent US2420071A successfully refreshed from Google Patents.
US2420071A
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US
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Turbine type hydraulic coupling
Assignee: Solar Corp
•
Filing: 1945-01-11
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Granted: 1947-05-06
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Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 George C Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:00
CPC Classifications
F; F16; F16D; F16D33/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1047948A
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US1535474A
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US1972741A
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US2117011A
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US2216747A
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DE687919C
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US2318187A
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US2294994A
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US2340494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-05 | 1950-11-04 | 1951-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-05 | 1954-11-04 | 1955-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-05 | 1958-11-04 | 1959-05-06 | $7700.00 | Window Closed / Lapsed |