Patent US2501165A successfully refreshed from Google Patents.
US2501165A
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Hydrodynamic machine
Assignee: Oilgear Co
•
Filing: 1945-08-23
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Granted: 1950-03-21
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Expires: 1965-08-23
Abstract
No abstract record available.
Inventors
- 👤 Ferris Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:01
CPC Classifications
F; F01; F01B; F01B1/00; F01B1/06; F01B1/0675; F01B1/0686; F01B1/0689; F01B13/00; F01B13/04; F01B13/06; F01B13/061; F01B13/063; F01B13/065; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0435; F03C1/0444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191127721A
Cited
GB191302784A
Cited
US1256501A
Cited
GB208591A
Cited
US1817080A
Cited
US2406138A
Cited
US2381741A
Cited
US2337821A
Cited
US2397314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |