US2651919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary hydraulic coupling
Assignee: Twin Disc Inc
•
Filing: 1949-08-12
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Granted: 1953-09-15
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Expires: 1969-08-12
Abstract
No abstract record available.
Inventors
- 👤 Evert L Venstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:08
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/06; F16D33/08; F16D33/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB290930A
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US1910696A
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US1937364A
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GB446530A
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US2298105A
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US2149369A
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US2223715A
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US2187667A
Cited
US2380074A
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US2325090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |