Patent US2457643A successfully refreshed from Google Patents.
US2457643A
Expired / Lapsed
US
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Rotary pump and packing therefor
Assignee: Individual
•
Filing: 1943-03-24
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Granted: 1948-12-28
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Expires: 1963-03-24
Abstract
No abstract record available.
Inventors
- 👤 Caserta Michele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:23
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0034; F04C15/0038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR596943A
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US1989900A
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US1944648A
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US2141171A
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US2189675A
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US2263091A
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US2192588A
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US2212833A
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US2268804A
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US2318337A
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US2280392A
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US2289441A
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US2351817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |