US2450137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage centrifugal pump
Assignee: AO Smith Corp
•
Filing: 1944-12-01
•
Granted: 1948-09-28
•
Expires: 1964-12-01
Abstract
No abstract record available.
Inventors
- 👤 Anatol J Harlamoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:02
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D1/00; F04D1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1476776A
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US1572269A
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US1711045A
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US1711193A
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FR670949A
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GB378615A
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US2034790A
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US2000874A
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US2064587A
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US2175641A
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US2246777A
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US2266107A
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US2318786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |