Patent US2477004A successfully refreshed from Google Patents.
US2477004A
Expired / Lapsed
US
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Screw type air pump
Assignee: Joy Manufacturing Co
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Filing: 1945-10-20
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Granted: 1949-07-26
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Expires: 1965-10-20
Abstract
No abstract record available.
Inventors
- 👤 Win W Paget
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:29
CPC Classifications
F; F04; F04C; F04C18/00; F04C18/08; F04C18/12; F04C18/14; F04C18/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US395956A
Cited
US1755945A
Cited
US2014932A
Cited
US2078334A
Cited
US2358815A
Cited
US2369539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |