Patent US2679728A successfully refreshed from Google Patents.
US2679728A
Expired / Lapsed
US
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Cooling system for rotary hydraulic couplings
Assignee: Fuller Manufacturing Co
•
Filing: 1950-03-24
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Granted: 1954-06-01
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Trail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:02
CPC Classifications
F; F16; F16H; F16H41/00; F16H41/24; F16H41/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2143312A
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US2168862A
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US2202243A
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US2164173A
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US2379015A
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US2334282A
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US2340494A
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US2363983A
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US2457692A
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US2585149A
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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) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |