Patent US2852922A successfully refreshed from Google Patents.
US2852922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet pump
Assignee: Rheem Manufacturing Co
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Filing: 1953-07-30
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Granted: 1958-09-23
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Expires: 1973-07-30
Abstract
No abstract record available.
Inventors
- 👤 Ernest P Neumann
- 👤 Lustwerk Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:35
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/06; F25B1/08; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/466; F25B2500/00; F25B2500/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US35575A
Cited
FR489905A
Cited
GB280336A
Cited
US1993300A
Cited
US2044811A
Cited
US2106804A
Cited
US2566864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |