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Patent US2480069A successfully refreshed from Google Patents.
US2480069A
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Hydraulic apparatus
Assignee: Denison Engineering Co
•
Filing: 1943-06-19
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Granted: 1949-08-23
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Expires: 1963-06-19
Abstract
No abstract record available.
Inventors
- 👤 Fred J Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0082; F01B3/0085; F01B3/0032; F01B3/0044; F01B3/0052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1820266A
Cited
US1924738A
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US1970133A
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US2071800A
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US2129828A
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US2129886A
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US2093477A
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US2096907A
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US2161143A
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US2107079A
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US2299233A
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US2300009A
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US2248449A
Cited
US2331694A
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US2292125A
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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) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |