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Patent US2451390A successfully refreshed from Google Patents.
US2451390A
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Hydraulic jack
Assignee: EUCLID PRODUCTION DEV CORP
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Filing: 1946-08-22
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Granted: 1948-10-12
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Expires: 1966-08-22
Abstract
No abstract record available.
Inventors
- 👤 Marion W Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:23
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US312726A
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US973353A
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US1225906A
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US1238939A
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US2044044A
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FR800990A
Cited
US2163959A
Cited
US2412414A
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 |