Patent US1337676A successfully refreshed from Google Patents.
Patent US2581172A successfully refreshed from Google Patents.
US2581172A
Expired / Lapsed
US
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Vane type hydraulic transmission
Assignee: Chisholm Ryder Co Inc
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Filing: 1947-08-16
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Granted: 1952-01-01
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Expires: 1967-08-16
Abstract
No abstract record available.
Inventors
- 👤 Robert H Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:22
CPC Classifications
F; F16; F16D; F16D31/00; F16D31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US890533A
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US1913758A
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US2031749A
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US2009507A
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US2076887A
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US2195901A
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US2313049A
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US2366765A
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US2460047A
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US2371942A
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US2426491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |