Patent US2571377A successfully refreshed from Google Patents.
US2571377A
Expired / Lapsed
US
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Rotary displacement pump
Assignee: PREC DEVELOPMENTS CO Ltd
•
Filing: 1948-05-14
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Granted: 1951-10-16
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Expires: 1968-05-14
Abstract
No abstract record available.
Inventors
- 👤 Olah George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:16
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/12; F04C2/14; F04C2/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US848446A
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US847946A
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US960993A
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US1105312A
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US1379587A
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US1620261A
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US1673259A
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US2212994A
Cited
US2479077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-15 | 1955-04-16 | 1955-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-15 | 1959-04-16 | 1959-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-15 | 1963-04-16 | 1963-10-16 | $7700.00 | Window Closed / Lapsed |