Patent US2449482A successfully refreshed from Google Patents.
US2449482A
Expired / Lapsed
US
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Reversible pump controlled hydraulic cylinder system
Assignee: Weatherhead Co
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Filing: 1945-03-12
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Granted: 1948-09-14
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Expires: 1965-03-12
Abstract
No abstract record available.
Inventors
- 👤 George H Hufferd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:01
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1429101A
Cited
US1690181A
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US1616841A
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GB360458A
Cited
US1940668A
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FR750179A
Cited
US2368659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-14 | 1952-03-15 | 1952-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-14 | 1956-03-15 | 1956-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-14 | 1960-03-15 | 1960-09-14 | $7700.00 | Window Closed / Lapsed |