Patent US2550373A successfully refreshed from Google Patents.
US2550373A
Expired / Lapsed
US
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Fluid pressure operated clutch
Assignee: FRANKS Manufacturing CORP
•
Filing: 1947-08-18
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Granted: 1951-04-24
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Expires: 1967-08-18
Abstract
No abstract record available.
Inventors
- 👤 John E Ortloff
- 👤 Wayland B Woody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:32
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/08; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US41586A
Cited
US423333A
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US1844935A
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US1865090A
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US2039128A
Cited
US2120798A
Cited
US2342880A
Cited
US2388857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-23 | 1954-10-23 | 1955-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-23 | 1958-10-23 | 1959-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-23 | 1962-10-23 | 1963-04-24 | $7700.00 | Window Closed / Lapsed |