Patent US2451089A successfully refreshed from Google Patents.
US2451089A
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US
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Hydraulic cylinder construction
Assignee: Individual
•
Filing: 1945-08-20
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Granted: 1948-10-12
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Expires: 1965-08-20
Abstract
No abstract record available.
Inventors
- 👤 Frank B Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:03
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US421088A
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US784943A
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US814491A
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US894380A
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US1093868A
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US1290590A
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US1631654A
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US1646736A
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US2229057A
Cited
US2349244A
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US2342812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |