US3229642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-stage pump
Assignee: Ingersoll Rand Co
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Filing: 1964-02-28
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Granted: 1966-01-18
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Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Val S Lobanoff
- 👤 Harold A Stahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/06; F04D1/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A MULTIPLE-STAGE CENTRIFUGAL FLUID MACHINE HAVING AT LEAST THREE STAGES COMPRISING: (A) A CASING INCLUDING INTEGRAL INTERNAL WALLS LOCATED MIDWAY OF ITS LENGTH AND CONTAINING A VOLUTE DISCHARGE PASSAGE FOR RECEIVING FLUID FROM THE PERIPHERY OF AN IMPELLER FOR AT LEAST ONE STAGE OF THE MACHINE; (B) A PLURALITY OF SEPARATE RINGS MOUNTED WITHIN SAID CASING AND CONTAINING DISCHARGE PASSAGES FOR RECEIVING FLUID FROM THE PERIPHERIES OF IMPELLERS FOR OTHER STAGES OF THE MACHINE;
Claim 2
Dependent Claim
74 words
A MULTIPLE-STAGE CENTRIFUGAL FLUID MACHINE HAVING AT LEAST THREE STAGES COMPRISING: (A) A CASING INCLUDING INTEGRAL INTERNAL WALLS LOCATED MIDWAY OF ITS LENGTH AND CONTAINING A VOLUTE DISCHARGE PASSAGE FOR RECEIVING FLUID FROM THE PERIPHERY OF AN IMPELLER FOR AT LEAST ONE STAGE OF THE MACHINE; (B) A PLURALITY OF SEPARATE RINGS MOUNTED WITHIN SAID CASING AND CONTAINING DISCHARGE PASSAGES FOR RECEIVING FLUID FROM THE PERIPHERIES OF IMPELLERS FOR OTHER STAGES OF THE MACHINE;
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |