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Patent US2720864A successfully refreshed from Google Patents.
US2720864A
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US
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Fluid pressure actuated operator for an impact press or the like
Assignee: SMITH JOHNSON CORP
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Filing: 1950-04-03
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Granted: 1955-10-18
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Neil V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:41
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B21; B21D; B21D22/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304286A
Cited
US1660720A
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US1907538A
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US1908504A
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US2055296A
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US2187371A
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US2152870A
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US2252418A
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US2241184A
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US2292095A
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US2444228A
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US2535588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |