US3289598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pumps
Assignee: Ingersoll Rand Co
•
Filing: 1965-10-21
•
Granted: 1966-12-06
•
Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Buse Frederic William
- 👤 Samuel H Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A CENTRIFUGAL PUMP COMPRISING: AN IMPELLER; A CASING SURROUNDING THE IMPELLER AND CONTAINING A VOLUTE-SHAPED CHAMBER EXTENDING AROUND THE CIRCUMFERENCE OF THE IMPELLER AND INCLUDING A CUTWATER AREA AT ONE END AND A THROAT OUTLET AREA AT THE OTHER END; SAID CASING BEING DIVIDED INTO TWO HALVES FOR PURPOSES OF ASSEMBLY OF THE PUMP; ONE OF SAID HALVES CONTAINING SAID CUTWATER AREA; AND A SPLITTER PARTITION LOCATED IN SAID VOLUTE CHAMBER AND WHOLLY CONTAINED IN THE OTHER OF SAID CASING HALVES
Claim 2
Dependent Claim
81 words
A CENTRIFUGAL PUMP COMPRISING: AN IMPELLER; A CASING SURROUNDING THE IMPELLER AND CONTAINING A VOLUTE-SHAPED CHAMBER EXTENDING AROUND THE CIRCUMFERENCE OF THE IMPELLER AND INCLUDING A CUTWATER AREA AT ONE END AND A THROAT OUTLET AREA AT THE OTHER END; SAID CASING BEING DIVIDED INTO TWO HALVES FOR PURPOSES OF ASSEMBLY OF THE PUMP; ONE OF SAID HALVES CONTAINING SAID CUTWATER AREA; AND A SPLITTER PARTITION LOCATED IN SAID VOLUTE CHAMBER AND WHOLLY CONTAINED IN THE OTHER OF SAID CASING HALVES
References Cited (Backward Citations)
US111026A
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US126639A
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GB190507730A
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US1390391A
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DE687311C
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US2764944A
Cited
US2849960A
Cited
US2955540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |